Ahead of Defense Secretary Mark Esper’s visit to Asia, the Department of Defense is hoping to renew efforts to bring back the remains of American soldiers that died or went missing in action in China.

According to Randall Schriver, Assistant Secretary of Defence for Indo-Pacific Security Affairs, Esper is set to meet his Chinese counterpart, General Wei Fenghe, on the sidelines of a meeting in Bangkok.

During WWII, the United States allied with Chiang Kai-shek’s nationalist forces in their joint struggle against the Japanese. This fighting was part of a broader campaign dubbed by the U.S. military as the China-Burma-India theatre. By 1949, however, Chiang found himself pushed out by Mao Zedong’s communist forces, which resulted in decades of diplomatic non-relations between Washington and Beijing. The relations were not resumed until the 1970s.

The repatriation of the remains is an issue with mixed results and continued inconsistency, which the DoD is seeking to improve. China is not the only country in which the U.S. has been looking. Back in March of this year, a U.S. military aircraft left Myanmar with the possible remains of a WWII U.S. soldier. Also, in July of 2018, North Korea returned the bodies of some U.S. troops dating back to the Korean War of 1950-1953.