The Naqshbandi-Khufiyya is the second largest Sufi tariqa in China. It was founded by Ma Laichi who lived in the 18th Century AD. The Naqshbandi-Khufiyya claims about 7% of the Hui people. Unlike the Naqshbandi-Jahriyya, the Naqshbandi-Khufiyya tariqa emphasizes the silent dhikr.
Source: "Muslim Chinese: Ethnic Nationalism in the People's Republic," by Dru C. Gladney (Harvard University Press, 1991).