大秦景教流行中国碑
After converting, Li Zhizao took an oath saying, "As long as I live, all that God has given me, I shall put to good use for Him." While still in Beijing, he presented Matteo Ricci with 100 taels of gold for the purpose of building a church there. Later Li would also be responsible for introducing Catholicism to his hometown of Hangzhou. The year after he returned home for his father's funeral, he brought with him two other Jesuit missionaries. In 1625 he was the first to publish the Chinese text of the Nestorian Stele.