MilitaryNanzhao captured Annan
In 860 and 863, Nanzhao captured Jiaozhi, the administrative seat of the Annan Protectorate, twice, killing and plundering many people. In 866, Gao Pian led his army to regain Jiaozhi, and the imperial court changed the Annan Protectorate to Jing Haijun, with Gao Pian as the military envoy.
Lasting legacyIt is generally believed that Daluo City built by Gao Pian in Cochin was later designated as the capital by the Vietnamese Li Dynasty and renamed Thang Long, which is the predecessor of Hanoi, the capital of Vietnam today.