The Chinese authorities deployed a satellite positioning system during the new crackdown on The Church of Almighty God.
Two Shanxi Province residents were detained for printing religious material and books.
The government has dismissed leaders of official churches in Henan for not implementing central government policies sufficiently.
The police monitored phones of the family members before arresting them during a joint operation between two regional law enforcement forces.
The bishop of Zhengding of the underground Catholic Church has been in and out of detention since 1989, and is still kept under strict surveillance.