China on Thursday said it had summoned US Ambassador to strongly protest America’s massive $1.83 billion weapons sales to arch-rival Taiwan and warned to impose sanctions against US firms involved in such business. Vice Foreign Minister Zheng Zeguang yesterday summoned Kaye lee, charge d’affaires of the US embassy in China, and conveyed the protest to the US over its arms sale to Taiwan. According to a foreign ministry statement issued today, Zheng made the statement shortly after the US administration announced a $1.83-billion arms sale package for Taiwan.