[1] His was also a Special Envoy for the Six-Party Talks, for which President Obama accorded him the personal rank of Ambassador.

[2][1] Over his 30-year diplomatic career, Hart's overseas experience includes three assignments to China and one each in the Soviet Union and Iraq.

[3] As Consul General to Hong Kong and Macau, he made good use of social media[4] and is well-liked locally; he is affectionately nicknamed "Clifford BB".

[1] Hart is a recipient of the State Department's highest commendation for diplomatic reporting and the U.S. Navy's Distinguished Public Servant Award.

[6] During a Facebook Live chat session in July 2016, Hart said that he will retire from his 33-year diplomatic career and return to Hong Kong to work for a private institution.