What should I do if the "Tongcheng Travel" app cannot be opened in Japan? Can the return network accelerator solve this problem?

What should I do if the "Tongcheng Travel" app cannot be opened in Japan? Can the return network accelerator solve this problem? In today's globalized world, more and more Chinese people choose to travel, study or work abroad. However, overseas Chinese often encounter a common problem: they cannot use domestic applications normally...