This study examines how home country government involvement and host country institutions, as well as bilateral political relations, affect the post-entry market expansion of Chinese state-owned enterprises (SOEs) in emerging and developing countries, and developed countries, using the case study method. The findings show that home country government involvement can either support or constrain SOEs' subsequent market expansion. In emerging and developing countries, under-developed institutions create difficulties which can deter the market expansion of Chinese SOEs, whereas in developed host countries the challenges associated with unfamiliar institutions can be overcome through experiential learning. The impact of host country institutions on the market expansion of Chinese SOEs is contingent on political relations between host and home countries.