Christianity in China has its historical background. Many people don't know what the "Three Ones" are, and there are historical reasons for calling the "Three Ones" as patriotic slogans. Before the liberation of China, the China Church was sent to China by foreign missionaries of the Mothers' Association to establish a church. Our church in China belongs to the "Daughter's Club", in which foreigners are mainly priests. Everything is decided by the "mother's club". Without the right to speak, the daughter will be subordinate to everything and have no autonomy. Coupled with the patriotic craze of China people, they are very angry with foreigners' "red hair", thinking that people in the church are unpatriotic and stay with foreigners, which leads people to misunderstand the church and scold it for having one more religious person and one less China person. Churches in China must have a clear attitude, respond to patriotic calls, draw a clear line with foreign countries, and work with the people of China to expel and overthrow imperialism! In this case, the Church of China put forward the principle of "Three Ones", namely, autonomy, self-support and autobiography. Autonomy means breaking off relations with foreign missions. Our own China people run the church in China, while foreign missions are evacuated from China. We in China have our own church. Self-sufficiency depends on our church in China, self-sufficiency, and no longer depends on the supply and support of foreign mothers' associations. Autobiography-We in China are the pastor of the church, preaching and teaching, that is, our own pastor in China.