On 16 December 2010, Vice Minister SUN Songpu hold a courtesy meeting with Ms. Mariko Silver, Deputy Assistant Secretary of U.S. Department of Homeland Secretary and Mr. Charles Stallworth, Head of the Office of International Affairs, U.S. Customs and Border Protection. The both sides exchanged views on strengthening the cooperation on law enforcement between the General Administration of China Customs and the U.S. Department of Homeland Security.