Thailand is a popular tipping country, generally starting at 2 baht (about 4 yuan money). In principle, all service industries can accept tips, including Michelin.

but giving or not is voluntary. I was in Thailand for 7 days on May Day and only gave it once. The taxi driver who went to the zoo was very enthusiastic.

the tour guides also ask for tips. I think they speak too much English and speak too little Chinese, so they don't give any.