BEIJING, May 16 (Reuters) - China's Commerce Ministry on Saturday described agreements on tariffs, agriculture and aircraft reached during U.S. President Donald Trump's visit to China last week as "preliminary".

Trump left Beijing on Friday after two days of ceremonial and friendly talks with his Chinese counterpart Xi Jinping, but which offered few details on achieving concrete results in trade and investment.

The ministry said in a statement on its website that the two sides agreed to establish an investment council and a trade council to negotiate reciprocal reductions in tariffs on certain products, as well as broader reductions on other goods, including agricultural products.

Regarding agriculture as well, Beijing said the two sides would work to resolve non-tariff barriers and market access issues.

Today’s statement represents China’s first public account of the outcome of trade talks held last week in Beijing and Seoul, and comes amid questions about what Trump’s first state visit to China in nearly 10 years has yielded.

Trump said China had agreed to buy 200 Boeing aircraft, but analysts raised doubts about the lack of a specific timetable.

The Commerce Department confirmed that arrangements were in place regarding "Chinese purchases of American aircraft and American guarantees regarding the supply of aircraft engines and spare parts to China," without providing further details.

The ministry said that discussions on the details are still ongoing, and that agreements "will be reached as soon as possible."