The US trade delegation has returned home from talks in China. Both sides committed to resolving the trade dispute, but big disagreements remain. Yang Zhao has the details.

Two days of China-US trade talks ended in Beijing on Friday with no breakthroughs.

The Trump administration is demanding dramatic concessions that challenge core elements of China's economic system. They include a 200-billion dollar cut in the US trade deficit with China by 2020.

China said "big differences" remained as the high-level US delegation headed home.

Some of the biggest voices in US economics warn that tariff-heavy approach to trade could drag the country to the disaster again. More than 1100 economists, including Nobel Prize winners and former Presidential advisers, sighed the letter to President Donald Trump. They quote directly from another letter sent in 1930 against protectionist measures at the start of what became the Great Depression.

HUA CHUNYING, SPOKESPERSON CHINESE FOREIGN MINISTRY "A joint letter from the US economists pointed out the essence and harm of the tariffs imposed on China by Washington. It once again proved that unilateralism and protectionism are no different to conducting a self-isolating siege. It does not conform to the rules of the market. It will do harm to not only others but also the US.

But the two sides have reached consensus in some areas, including the mutual understanding over the significance of fair trade to both countries and the rest of the world. China and the US agreed to set up procedures to stay in close touch.

The White House issued a statement, saying that though the two sides remained far apart, the talks were constructive.

The two countries are the world's biggest economies, and each has proposed high tariffs on the other's goods. US negotiators said they would report China's stance to Donald Trump.