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Liu said both China and Britain are committed to upholding and promoting free trade and open economies.

Both Britain and China support globalization and oppose trade protectionism, she said.

BEIJING, April 6 (Xinhua) -- China will immediately fight back fiercely without hesitation if the United States announces a list of additional tariffs on 100 billion U.S. dollars of Chinese products, said Foreign Ministry spokesman Lu Kang here on Friday.

"It is a battle between unilateralism and multilateralism, and between protectionism and free trade as well," Gao said.

The visa is valid for up to 10 years with multiple entries, or 180-day stays for a single entry, according to Yunnan Provincial Administration of Foreign Experts Affairs.