Is it useful to complain on the Xi tourist complaint hotline?

Useful. There is a time limit for complaints made by Xi Travel Hotline. The time limit for complaints is within 90 days after the end of the contract, and the accepting institution has no right to accept them. Xi 'an, referred to as "Gao", was called Chang 'an and Haojing in ancient times. It is the capital of Shaanxi Province, a sub-provincial city, a megacity and the core city of Guanzhong Plain urban agglomeration.