U.S. President Donald Trump's complaints about China's trade practices have increased the odds that a 25-year-old U.S. law that established free trade with Beijing is repealed, trade experts said, a move that could raise tariffs to 61% on average.

The tariffs have also provoked political tension, including retaliation from China, which responded to Trump's move with tariffs on US goods and an anti-monopoly probe of Google, among other measures. The speed with which China filed its complaint with the WTO is an indication of Beijing's readiness for the trade fight.

Beijing announced tariffs on Tuesday on some American imports including crude oil, agricultural machinery and liquefied natural gas, in retaliation for the Trump administration’s imposition of 10% tariffs on Chinese imports into the United States.

U.S. President Donald Trump this week shut a trade loophole that has been used to ship low-value packages duty-free from China, the "de minimis" exemption on import tariffs. Trump's halt to Section 321 de minimis is part of his implementation of an additional 10% tariff on China and 25% tariffs on Canada and Mexico,

After a 10 percent tariff on Chinese products took effect on Tuesday, China announced retaliatory measures, including tariffs and an investigation of Google.

China has launched a dispute at the World Trade Organization (WTO) over tariffs imposed by U.S. President Donald Trump on Chinese goods, the Geneva-based body said on Wednesday.

China’s Ministry of Commerce announced Tuesday it was implementing counter tariffs against the U.S. on multiple products