President Xi Jinping

Japanese Prime Minister Fumio Kishida made a surprise visit Tuesday to Kiev, stealing some of the global attention from Asian rival President Xi Jinping of China, who is in Moscow to show support for Russia against the West over the Kremlin's invasion of Ukraine.

Chinese shares took another tumble on July 6, defying government efforts to arrest a precipitous fall that has wiped an estimated $3.2 trillion off markets and threatens the world's number-two economy.

The government over the weekend announced a halt to initial public offerings (IPOs) and moves to pour funds into the market to end three weeks of plunging prices.