The two countries also held a joint coast guard exercise against illegal fishing on Friday in the waters off Danang in central Vietnam.
The two countries in past months have seen their relations sink to a low unseen in decades.
The truce between the US and China in imposing new tariffs hasn't reversed the recreational vehicle industry's declining sales, and the slide is likely to continue, analysts said.
The two buses carried a total of about 40 passengers.
The two countries should maintain the political premise of bilateral ties, steadily boost exchanges and cooperation, and push bilateral ties to develop and improve in the right direction.
The troops were part of the US-led international coalition that conducted air raids against IS targets in both Iraq and Syria.
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The ultimate solution lies in encouraging competitiveness of companies and improving infrastructure construction, said Jing Chunmei, a researcher with China Center for International Economic Exchanges.
The two countries should seize the opportunity of the anniversary, uphold the spirit of learning from history and looking to the future, and abide by the two countries' four political documents and four types of principle consensuses, Lu told reporters.
The two leaders did not specifically mention car tariffs in their statements, keeping the focus on other industrial products.
The two companies will put on Secret Cinema Presents Casino Royale this November in Shanghai, where they will recreate some of the most memorable moments from the 2006 James Bond hit.