BEIJING, May 6 (Xinhua) -- At the invitation of Russian President Vladimir Putin, Chinese President Xi Jinping will pay a state visit to Russia from Wednesday to Saturday and attend in Moscow the ...

一副飞行员眼镜，一顶皮革飞行帽……这是曾参与中国人民抗日战争的苏联志愿飞行员尼古拉·马特维耶夫的遗物。A pair of pilot goggles, a leather flight helmet...These are relics of ...