Dai Li
In 1937, Tang bought a house on Route Ferguson in the Shanghai French Concession and retired there. The following year, the Japanese invaded and occupied Shanghai (though not yet the foreign concessions). Japanese general Kenji Doihara attempted to recruit Tang to become president of the new pro-Japanese puppet government, and Tang was willing to negotiate with the Japanese. The Kuomintang's intelligence agency Juntong learned about the negotiation, and its chief Dai Li ordered his assassination. On 30 September 1938, Tang was killed in his living room by a Juntong squad who pretended to be antique sellers.