Chinese Premier Wen Jiabao Friday urged all nations to further open their markets and reject rising protectionism in the fight against current financial crisis. Wen made the remarks while addressing the opening ceremony of the 110th Session of China Import and Export Fair, or known as the Canton Fair, in the southern city of Guangzhou. \"As we are in the middle of resisting the international financial crisis, promoting trade and investment among countries holds the key to early world economic recovery,\" Wen said. The stalled Doha Round of global trade talks, rising trade and investment protectionism and evident tendency of politicizing trade frictions have \"cast a dark shadow over world economic recovery\", the premier said. At a time of volatile financial markets and marked slowdown of major economies, the international community should work together to open wider their markets, reject trade and investment protectionism of all forms and find proper and more rational solutions to trade frictions, he added.