Where is the Thai Consulate?

The Thai Consulate in Kunming can indeed handle the passport extension procedures for Thai citizens in China, but you must present the original passport that is extended or needs to be extended. You can go to the Kunming Hotel at the Baita Intersection of Dongfeng West Road, Kunming City. .

The Thai Consulate is inside the Kunming Hotel, the building next to the nightclub in Pattaya.

Ask your friend to apply for it quickly. It will be very troublesome to extend it after it expires.