In USSR the majority church was the Orthodox, with a history of it having been the state church. In China the majority church is Protestant. In USSR there was a large registered church and a very small unregistered church. In China the unregistered churches are equal to or greater than the registered churches. The USSR opened up on a great economic downturn.
China is on a great economic boom with endless vitality.
There was no parallel to the strong overseas Chinese churches in the case of the USSR and Eastern Europe. The unregistered or house churches which tend only to have regional or local structures. The overseas Chinese churches, symbolized by the 49 chapters of the Chinese Coordinating Committee for World Evangelization. The denominational churches in the rest of the world. The evangelical churches in the rest of the World.