BEIJING/TAIPEI, October 22 (Reuters): China threatened on Thursday to retaliate against the latest U.S. arms sale to Chinese-claimed Taiwan, as the island welcomed the weapons package but said it was not looking to get into an arms race with Beijing. The Trump administration has ramped up support for Taiwan through arms sales and visits by senior U.S officials, adding to tensions between Beijing and Washington, already heightened by disagreements over the South China Sea, Hong