Collections of thomisid spiders by amateur and professional arachnologists in China have led to the discovery of some interesting crab spiders (Thomisidae). Two new species in two genera of thomisid spiders are described and illustrated with photographs and SEMs: Pharta xizang Liu & Yao, sp. nov. (♀) and Stephanopis qiong Liu & Yao, sp. nov. (♀). The previously unknown males of Borboropactus longidens Tang & Li, 2010 and Stephanopis xiangzhouica Liu, 2022 were also collected and are described for the first time. The genus Borboropactus Simon, 1884 is reported for the first time from Vietnam. The new Stephanopis species is also recorded for only the second time from the Asian mainland. Distributions of all these species are mapped.