Complex sentence: After the events of Tiananmen Square some of the staff members of "River Elegy" were arrested and some staff members Mainland China; two of the main writers who fled to the United States became evangelical Christians.
Split into simpler sentences: After the events of Tiananmen Square some of the staff members of "River Elegy" were arrested and others fled Mainland China. Two of the main writers who escaped to the United States became evangelical Christians.