Trump May Call Off Trade Talks With Beijing

US President Donald Trump said on Friday that he was not ready to finalise a trade deal with Beijing and signaled he might cancel talks set for September, raising the stakes in the intensifying Sino-US trade war.

"We'll see whether or not we keep our meeting in September," Trump told reporters at the White House before heading out on vacation at his New Jersey golf resort.

Relations have soured further in the past week after Trump announced a new round of punitive tariffs on Chinese goods, despite a truce agreed with President Xi Jinping, and Beijing responded by halting all purchases of US agricultural goods.

The US Treasury then declared China a currency manipulator, after the yuan lost value in the face of the new round of tariffs due to take effect September 1.

"We're not ready to make a deal but we'll see what happens," Trump said. "We have all the cards. We're doing well."

US and Chinese negotiators met in Shanghai late last month for the first time since talks collapsed in May, and were due to hold another round in September.

"Whether or not they're canceled, we'll see," Trump said. (AFP)