Chinese President Xi Jinping will pay state visits to Russiaand Germanyfrom July 3 to 6, the Foreign Ministry announced on Tuesday.Xi is invited by Russian President Vladimir Putin, German President Frank-Walter Steinmeier and Chancellor Angela Merkel, said Foreign Ministry spokesperson Lu Kang.

Image provided by the Presidency of Colombia shows Colombian President Juan Manuel Santos (L, front), the head of the United Nations Mission in Colombia Jean Arnault (C, front),  attending the ceremony of the handing over of weapons by the FARC, in Buenavista, Colombia, on June 27, 2017.

An Iranian man and his child play at the Caspian sea beach near Sari city, northern Iran, on June 26, 2017.People enjoy themselves at the Caspian sea beach near Sari city, northern Iran, on June 26, 2017.

Ships take part in a drill on oil spilling at sea near Caofeidian in north China's Hebei Province, June 27, 2017. The drill was held to improve the ability of local maritime departments to handle emergency situations on oil spilling.

Visitors enjoy various special cuisines before having an audience with the Sultan Haji Hassanal Bolkiah at Istana Nurul Iman, the royal palace of Brunei in Bandar Seri Begawan, capital of Brunei, June 27, 2017.

A PV power station was officially put into use on Tuesday in Si'an, which allows agricultural production under the PV panels and is expected to generate more than 70 million kwh electric power every year.