大秦景教流行中国碑
As the persecution campaign in the mainland China abated, Fr. Semedo changed his Chinese name from Xie Wulu to Zeng Dezhao and re-entered China, now working in Jiangsu and Jiangnan provinces. He spent most of his term in China in the central and southern provinces; perhaps his only trip north was the one he made to Xi'an in 1625, during which he was the first European to see the recently unearthed Nestorian Stele.