State Councillor Yang Jiechi met Vietnam's Foreign Minister Pham Binh Minh for the first high-level talks between the communist neighbours since early May, when vessels from both sides collided near the deep-sea rig prompting deadly anti-China riots in Vietnam and an evacuation of nationals by Beijing.
"We welcome the visit of our Chinese comrade to Vietnam to discuss issues between the two countries," Pham Binh Minh, who is also a deputy prime minister, told reporters before the meeting today.
Yang Jiechi will also meet with Vietnam's Prime Minister Nguyen Tan Dung and leading party officials in Hanoi.
The two sides have spent the last month trading accusations in the increasingly heated maritime territorial dispute, with each side claiming the other has engaged in aggressive behaviour against its ships, including by ramming them.
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It marked a nadir in relations since a border war in 1979.
"Relations between China and Vietnam are currently experiencing difficulties," Yang Jiechi told reporters before the talks.
Yang was previously China's foreign minister. But he moved up to the State Council, the country's cabinet, last year, making him more powerful than the current foreign minister.
Vietnam's communist leaders have struggled to balance strong domestic opposition to China's unilateral moves in the South China Sea with their traditionally friendly ties with a fellow communist country.
Anti-Chinese riots sparked by Beijing's dispatch of the rig claimed three Chinese lives in Vietnam last month, according to Hanoi. Beijing says four Chinese citizens died.
The US called the deployment of the rig in contested waters "provocative" and Vietnam's Prime Minister Nguyen Tan Dung has announced Hanoi is considering legal action against China.