According to data released by the ministry, US investment in China decreased 19.6 percent year-on-year in the first eight months, with the drop more drastic in the first half of the year.

"Some areas of US services investment in China are not in accordance with those fields that China is opening to the world, despite the rapid increase in foreign investment in China's services sector," said Shen.

"However, based on information released by the China General Chamber of Commerce－USA, most US companies are still confident and willing to continuously invest in China while reporting positive company growth."

According to the ministry, US companies used to witness a rapid growth in investment in China. The biggest casualty of the fall in investments is the less-than-satisfactory performance of these firms this year.

Data released by the ministry showed that imports and exports of China's services trade witnessed a higher market concentration rate during the first six months.

The US, together with Japan, South Korea and Australia, were the major services trade partners of China during the first half, with the total volume of foreign trade accounting for 52.1 percent of the national foreign trade, said the ministry.