Chiang Kai-shek's faction accused Lin Boqu of planning the unrest, viewing it as an attempt to turn international opinion against the KMT. Lin, a member of both the CCP and the KMT, had been serving as political commissar of the Sixth Army, part of Cheng Qian's forces. Whoever was responsible, the Nanjing Incident represented the culmination of tensions within the First United Front. The nationalist government had moved from Guangzhou to the new city of Wuhan, which was formed from a merger of Wuchang and two other nearby cities. The Wuhan administration gradually drifted away from Chiang, becoming a centre of leftist, Soviet-backed power within the KMT and constraining his authority. Communist-led trade unions staged near-constant demonstrations in Wuhan itself, and across the nominally KMT-controlled territories, establishing parallel structures of administration in areas liberated by the NRA.