BEIJING, March 19 (Reuters) - The US destroyer Ralph Johnson's sail-through of the Taiwan Strait on Mar 17 was a "provocative" act by the United States and sent the wrong signals to pro-Taiwan independence forces, the Chinese military said on Saturday (Mar 19).

Such an act was "very dangerous", a Chinese military spokesperson said in a statement, adding that troops were organised to monitor the Ralph Johnson's passage.

China says Taiwan is the most sensitive and important issue in its relations with the United States. Washington has no formal diplomatic relations with Taipei, but is Taiwan's most important international backer and arms supplier.

Chinese President Xi Jinping told his US counterpart Joe Biden on Friday that the Taiwan issue needs to be handled properly to avoid a negative impact on Sino-US relations.