How do you say sexual intercourse in Chinese?
— 性交; 性交

Generic synonyms for sexual intercourse in Chinese
sex性別, 性别 (xìngbié)
Specialized synonyms for sexual intercourse in Chinese
ass驢, 驴 (lǘ), 驢子, 驴子 (lǘzi)
fuck幹, 干 (gàn), 搞 (gǎo), 操 (cào), 肏 (cào)