U.S. President-elect Donald Trump complained about Chinese economic and military policy on Twitter on Sunday, showing no signs of a conciliatory approach after a phone conversation with Taiwan's president raised hackles in Beijing.

Trump's unusual call with Taiwan President Tsai Ing-wen on Friday prompted a diplomatic protest with the United States on Saturday, although Vice President-elect Mike Pence downplayed its significance, saying it was a "courtesy" call, not intended to show a shift in U.S. policy on China.

Trump, who vowed during his campaign he would label China a currency manipulator, continued some of his hard-line rhetoric on Sunday.