It depends on the university. Some are not allowed in, but most are.

There is also going to Thailand. Can I communicate with local people in English?

Tourist attractions must communicate with waiters in English, but in the street, just like China, few people can speak English.

How does the consumption level in Thailand compare with that in China?

Similar to China, some places are a little cheaper, and some places are extremely expensive.

Is there a place like Chinatown in Thailand?

There is Chinatown in Bangkok, Thailand, which is very prosperous and a relatively prosperous place nearby.

And the attitude of Thais towards China people …

It depends. If they are in shops or hotels, they may think that Chinese mainland people are stingy and seldom travel and buy things. But in the street, they can't know that you are from China at a glance, because many Thais are also from China. Also, Thais don't reject China like Indonesians do.