The dynamism and increasing openness of China's economy is well known. Recognizing that more freedom leads to greater economic growth, China's rulers have been loosening their controls on economic activity. But when it comes to other freedoms, particularly religious liberty, the rulers continue to take a hard-line approach. According to the U.S.-based Cardinal Kung Foundation, every one of the underground Catholic Church bishops is either in jail, under house arrest, under strict surveillance, or in hiding. Bishop Su Zhimin of Baoding, in Hebei province, was arrested in 1997, and resurfaced only in the past week. He was spotted, still under...