It depends really.
First, what constitutes China; modern OTL China, China minust Tibet and Xinjiang etc.
Do you mean direct control, IE it being considered Japanese territory, or indirect control, IE China being de jure independent, but de facto controlled by Japan.
Without creating a new Sino-Japanese identity (the Chinese are'nt going to become Japanese and the Japanese are'nt going to become Chinese in large nubers), the best bet I think would be Japan annexing some of China diectly (a slighly larger Manchkou) and controlling the remainder of China as a partially autonomous puppet.
First, what constitutes China; modern OTL China, China minust Tibet and Xinjiang etc.
Do you mean direct control, IE it being considered Japanese territory, or indirect control, IE China being de jure independent, but de facto controlled by Japan.
Without creating a new Sino-Japanese identity (the Chinese are'nt going to become Japanese and the Japanese are'nt going to become Chinese in large nubers), the best bet I think would be Japan annexing some of China diectly (a slighly larger Manchkou) and controlling the remainder of China as a partially autonomous puppet.