Ambassador at Large for International Religious Freedom David Saperstein was on a 8-day visit, starting from August 20 to China.
Saperstein raised a number of ongoing concerns of the US regarding the Chinese government's human rights violations pertaining to religious freedom during his visits to Beijing, Shijiazhuang, Shanghai, Hangzhou, and Hong Kong, a statement said.
He called for an end in the ongoing campaign church demolitions in Zhejiang province and harassment of members from unregistered religious groups.
In meetings with government officials, Saperstein noted positive developments, including the growth of religious communities in China.
He also recognised the significant increase in the contributions of faith-based organisations to Chinese society, especially in the provision of social services, the statement said.