The reason is that the tourism infrastructure in Central Asia is backward and Central Asia has fewer tourism resources. According to the query global journey network shows.

1, Central Asia's tourism infrastructure is backward: Central Asia's tourism infrastructure is backward, including hotels, transportation, food and beverage, etc., the tour group needs to pay a higher cost to get a good quality of service.

2, Central Asia's tourism resources are few: compared with other popular tourist destinations, Central Asia's tourism resources are limited, most of the attractions are scattered, the transportation is not convenient, and it takes longer time and higher cost to visit.