Tourism destination is a place providing attraction for travelers and equipped with related tourism facilities, which is corresponding to tourist source and tourism transit. Different from general tourist sites or scenic spots, it possesses unique image and perfect regional management and coordination organization, and can motivate potential tourists to travel and achieve tourism purpose [2] .

Distribution channel is various structures with independent organization existing in process of providing products or services to customers and commercial clients; in marketing, distribution channel is generally used to transfer commodities (tangible products) from producers to customers; in hospitality industry, it often transfers customers to products: hotels, restaurants, pleasure-boats or planes [3] . In Buhalis’s opinion, distribution channel is a way to promote purchase decision by providing enough market information to consumers at proper time and place [4] .

In the early 1980s, Bitner & Boom defined tourism distribution channel as a way for tourism organizations to communicate and sell their products or services [5] . Smith & Xiao suggested that tourism distribution channels could be regarded as different presentation of tourism supply chain for invisibility and complexity of tourism products [6] . Pearce, from view of tourists, adopted field research method to study distribution channels met by tourists in Rotorua and Wellington of New Zealand, which provided a new perspective for improvement of tourism distribution channels [7] . Reid & Pearce studied distribution channels of New Zealand outbound tourism from the perspective of national market, pointing out development trend and challenges of distribution channels [8] . In recent years, Internet has been greatly affecting tourism industry, thus traditional distribution channel suffering great attack. Therefore, Kazak made a study on transformation of tourism distribution channels, pointing out the development of Internet and rise of E-commerce, and redefining how tourists found and bought products [9] . Kang & Brewer et al pointed out in the study that traditional and online distribution channels can expand market share, but the coexistence of both will inevitably lead to conflicts [10] . When taking global distribution system (GDS) as a study object, Granados et al. put forward that, tourism distribution channel undergoing re-intermediation shall still meet challenge of disintermediation [11] .

Kracht & Wan studied historical dynamic changes of tourism distribution channels as well as interaction process of Internet and distribution channels with tourism destination as the object of study [12] . Considering “disintermediation” development of existing distribution channels, Law, through interviews, visited traditional travel agencies and hotel managers of Hongkong tourism destination, and studied disintermediation problem of tourism destination distribution channel from view of tourism products and service suppliers and traditional intermediaries [13] . With popularization of Internet technology in China, Chinese scholars have gradually shifted focus of tourism distribution channels to the impact of Internet on tourism distribution channels. In the case of Mount Huangshan, Zhang Chaozhi and You Wang made dynamic analysis on the influence of Internet on distribution channels of Mount Huangshan tourist destination from diachronic view [14] .

In summary, the current research of tourism distribution channels mainly from the perspective of different channel members, Which focus on the development status and the trends of tourism distribution channels, the impact of the Internet, channel integration, and the evaluation index items of distribution channels. Distribution channels affect profits of all members in tourism value chain, the current research on tourism distribution channels lacks overall research on distribution channel and evaluation indicator system on overall distribution channel of tourism destination is much less. Therefore, the research, by using Delphi and AHP, constructs evaluation indicator system on distribution channel of tourism destination so as to enrich domestic whole research on distribution channel of tourism destination.

Internal controllable factors greatly affecting development of distribution channel of tourism destination include enterprises and products; external uncontrollable factors refer to distribution environment, including economy, social culture, technology, competition and political and legal environment [15] . Good distribution channel of tourism products shall have characteristics with evident continuity, prominent radiativity, comprehensive matching and ideal economic benefits [16] . When choosing evaluation indicators of tourism distribution channel, make comprehensive evaluation by referring to internal and external factors and channel’s characteristics.

Then, evaluation hierarchy can be divided into three parts: I. Target hierarchy is a comprehensive evaluation on distribution channels of tourism destination; II. Criterion hierarchy includes internal controllable factor and external uncontrollable factor, and the two also contain several other factors; III. Scheme hierarchy is actual situation of distribution channel of a specific tourist destination.

Han Lijiao and Fan Guoyong constructed the two level evaluation index system of marketing channel, involving 25 indexes in 4 aspects [17] . Zhang Shixin and Chen Guiquan put forward 8 specific evaluation indexes of distribution channel efficiency [18] . After consulting previous literatures, evaluation indicator system on distribution channels of tourism destination has been preliminarily established. The indicator system is divided into three levels, and the first level is internal controllable factors and external uncontrollable factors; the second level includes economic performance, tourism products, tourism enterprises, market level, customer perspective and distribution environment; the third level divides the second level into 25 specific indicators [15] [16] [17] [18] . In order to make scientific and representative indicators, the writer interviewed professors of Shenzhen Tourism College of Jinan University and senior director and account manager of Shenzhen CYTS for further screening and sorting of these 25 indicators. The five-grade marking system is adopted, and each score represents different meaning as follows: 1 = minimal influence, 2 = little influence, 3 = certain influence, 4 = greater influence, 5 = remarkable influence. Weighted average of collected experts’ scores is as Table 1.

Eliminate D₁₂ and D₂₂ below 3 points, namely indicators with little and minimal influence; Although D₁₉ customer satisfaction has a greater influence, it is difficult to balance, and customer satisfaction research on distribution channels can be carried out separately and the research will not have a further study on it, thus, eliminating the indicator; presentation of D₁₈, D₂₁ and D₂₃ can be respectively changed into effective communication, economical situation and technical level, and at the same time, change No. of D₂₁, D₂₃ and D₂₅, thus finally getting 22 indicators.

After determining detailed indicators, make upward induction of indicators, forming three level indicators, and evaluation indicators of each level are developed from the evaluation indicators of the previous level, while evaluation indicators of the previous level can reflect its overall evaluation through lower indicators’ evaluation. The evaluation indicator system is shown in Table 2.

The indicator integration sources: see references [15] [16] [17] [18] .

The research used Delphi and AHP, designed index questionnaire, and collected the influence degree of index on tourism distribution channel. Thus, 5 scholars of Shenzhen Tourism College of Jinan University and Shenzhen University and 4 directors and senior account managers of Shenzhen CYTS MICE Service Co. Ltd have been invited to compare and score indicator questionnaire, getting the relative importance score of each indicator. This questionnaire adopts the 1-9 scale method, by comparing each other to determine the weight of each item on the previous layer.

After consistency test, calculate the constructed judgment matrix, input experts’ score by Yaahp, getting judgment matrix of each expert’s score, and by the group decision making in software, make weighted geometric average for each expert ranking vector, getting combination weights of each indicator (as shown in Table 3).

From the point of view of the combination weight of one-level indicator, the influence of B1 on distribution channel is greater, up to 75.12% while B2 only accounts for 23.88% when the tourism destination distribution channel is evaluated. Internal controllable factors refer to what can be adjusted internally by tourism enterprises to adapt distribution channel with current situation, and considering it as evaluation focus, together with external uncontrollable factors, enterprises constantly improve the distribution channels.

From the combination weight distribution of two-level indicators, C1 weight of internal controllable factors is the largest, reaching 35.19%, followed by C2 weight of 27.18%, which is in line with economy in evaluation criteria of distribution channels. Economic standard is the basic starting point of tourism destination enterprise marketing. Therefore, when choosing distribution channels, enterprises should pay more attention to economic performance. The benefits of tourism products are complex, and product factors can influence channel revenue, and its impact on channel evaluation cannot be ignored. From the external uncontrollable factors, weight of C4, compared to C5 and C6, is slightly larger, reaching 8.53%. Obviously, market factor and choice of channel type are closely related, and the channel evaluation and improvement also must be considered from market factor.

From the combination weight of three-level indicator, in detailed indicators, D1 and D7 weights rank top one and top two, reaching 17.52% and 12.53%, and D7 indirectly influences D1. Economic efficiency is the most important factor for enterprises to evaluate distribution channels; in improving distribution channels, product service levels and product value shall also be improved so as to increase distribution profits. The weight of C3 is less than C1 and C2, but compared to weight of other three-level indicators, the weight of D8 in C3 is relatively large, indicating that corporate scale of tourism destination is the basis of distribution channel selection and design, and corporate actual situation shall be considered to choose proper channel when improving distribution channels.

Shenzhen OCT tourist resort, with coverage of 4.8 square kilometers, has four large cultural theme parks, Splendid China, China Folk Culture Village, Windows of the World and Happy Valley, visited by more than 6 million people every year. There are also more than 20 cultural entertainment, tourism and leisure facilities and various hotel facilities, including art gallery, art center, School of Tourism, public recreational parks, sports clubs, large shopping plaza and etc. For having the most concentrated cultural theme park group, cultural theme hotel groups and cultural facility group in China, it becomes the first batch of Chinese 5A grade scenic spot, the first batch of national civilized scenic area and national cultural industry demonstration zone.

OCT tourist resort, following the pace of Internet development, chooses distribution channel conforming to its own development and the times, which becomes the important work of its profit channel diversification. As a representative tourism destination, development of distribution channel of Shenzhen OCT tourist resort has a certain reference function for the development of other tourism destinations.

Evaluation indicator system on distribution channel of tourism destination is constructed above, and 12 managers, business dealers and salesmen of Shenzhen OCT tourist resort were invited to score for importance of evaluation indicator and its actual performance in OCT tourist resort. The score is divided into nine points, corresponding to scoring system adopted in determining indicator weight.

By weighted average, calculate indicator importance score and actual performance score of OCT tourist resort, seeing Table 4.

The one-level indicator includes internal controllable factors and external uncontrollable factors, with weights of 76.12% and 23.88% respectively. It is shown in Figure 1 that the internal controllable factors of OCT tourist resort have greater influence on distribution channel evaluation and score differences, with indicator importance score of internal controllable factors of 1.2391 and actual performance score of OCT tourist resort of 0.9016. It shows that OCT tourism resort should pay attention to improving internal controllable factors when perfecting distribution channel.

By analyzing scores of one-level indicator and two-level indicator, general direction and detailing direction of improvement of tourism distribution channels can be respectively gotten. As can be seen from Figure 2, distribution channels of OCT tourism resort are deficient in C1 and C2 indicators. The weights of the two two-level indicators are 35.19% and 27.18% respectively. The C1 indicator importance score is 0.9066, and the actual performance is 0.8156; the C2 indicator importance score is 0.5727 and the actual performance is 0.2348. C1 and C2 are internal factors, indicating that distribution channels of OCT tourist resort need to be further improved in terms of internal controllable factors, economic performance haven’t reached the expected goal of management of scenic spot and product added value and level also need to be improved. Although various indicators importance score and actual performance scores of OCT tourist resort

are different, its impact on the comprehensive evaluation results is relatively small for the indicator weight is small.

The three-level indicator is the refinement of two-level indicator, and by analyzing three-level indicator score, deficiencies and improvement of distribution channels of OCT tourism resort can be further understood. As can be seen from Figure 3, the performance in each indicator of distribution channels of OCT tourist resort has not reached the expectations of managers, especially in D5, D2, D1 and D7 indicators. In the four indicators, there are main reasons causing actual performance score of OCT tourist resort lower than indicator importance

score: ① Distribution channels of OCT tourist resort is not up to the management goals in these four aspects, namely the distribution channels in these four areas need to be improved first. Therefore, the staff of this scenic spot scored performance of OCT tourist resort lower than the indicator importance; ② The four indicators are internal controllable factors, with high weight in evaluation system, further widening the gap between the score, causing more obvious difference between importance score and performance score.

The destination layer of the empirical study is the comprehensive evaluation of Shenzhen OCT tourist resort distribution channels. The comprehensive evaluation score of indicator or of OCT tourist resort distribution channel = importance score or actual performance score. The results are as follows: comprehensive evaluation score of indicator importance in OCT tourist resort distribution channels is 7.6181 while the actual performance is 6.7345, whose difference shows that the evaluation indicator system of this research can make comprehensive evaluation on tourism destination distribution channels based on detailing three-level indicators; differences between actual performance and the expected goals of tourism destination can be gotten according to managers’ score, and then tourism destination distribution channels can be adjusted according to these differences.

Through the analysis of indicators in various levels and comprehensive evaluation, the following three problems are verified: ① The existing distribution channels of OCT tourist resort is insufficient, having not reached the expected target of scenic managers and operators; ② Internal controllable factors of tourism distribution channel greatly influence the distribution channel development, so the internal controllable factors adjustment is the focus aspect to improve distribution channel; ③ Analysis of field survey data demonstrates reasonability and scientificity of evaluation indicator system on distribution channels of tourism destination, having certain reference significance to the research on the evaluation of distribution channels.