BEIJING — A key figure in one of China’s best-known churches was released on bail this week, six months after she and dozens of other members of the congregation were detained and their church was closed.

The release on Tuesday of Jiang Rong, 46, still leaves her husband, Wang Yi, pastor of Early Rain Covenant Church, and four other church members in detention. According to a church news release posted on the church’s Facebook page, Ms. Jiang was reunited with the couple’s son, Shuya, who had been living without his parents since they were detained on Dec. 9.

News of the release of Ms. Jiang and another church member was confirmed by a human rights lawyer familiar with the case, who asked to remain anonymous for fear of government retribution.

More than 100 members of Early Rain, which is based in the southwestern city of Chengdu, were detained on Dec. 9 as part of a continuing crackdown on churches, mosques and temples not registered with the state. About half of them were quickly released, but 54 were held for a period of days or months.