Except when it doesn't.
Six Uyghurs Caught Escaping From a Thai Jail Could be Sent Back to China, 2017.11.23 https://www.rfa.org/english/news/china/thailand-uyghurs-11232017172012.html; "Dilxat Raxit, spokesman for the World Uyghur Congress exile group, said he has doubts over whether Bangkok will do as it promises."
Thailand forcibly sends nearly 100 Uighur Muslims back to China. https://www.theguardian.com/world/2015/jul/09/thailand-forcibly-sends-nearly-100-uighur-muslims-back-to-china ; [In 2015, rights groups condemned Bangkok’s decision to deport 109 Uyghurs to China, which branded them "terrorists" and broadcast photos of them being flown back with hoods over their heads] . Volker Türk, UNHCR’s assistant high commissioner for protection, who was currently in the region said: “I strongly urge the Thai authorities to investigate this matter.”