Zhenbao Island

It is on the Ussuri River on the border between Primorsky Krai, Russia, and Heilongjiang Province, China.

China (PRC) held that "in the absence of an explicit treaty provision, the central line of the main channel—the Thalweg principle—provided a legal basis for delimiting the boundary in the two rivers.

[5] The dispute over Zhenbao raised concerns that it could ignite World War III until an initial resolution of the conflict in November 1969.

In his memoir, US President Richard Nixon recounted a story that Premier Zhou Enlai (Chou En-lai) had told him about the border dispute: "Later on, when he had loosened up considerably, he told an amusing story that he said took place during a Sino-Soviet border flare-up in 1969.

At the time of the Chen Pao [Zhenbao Island] border incident, however, Kosygin picked it up and called us.