Pakistan and China on Sunday signed an agreement here for cooperation in hydel power generation. Wapda Chairman, Shakeel Durrani and President of China Three Gorges Project Corporation Li Yong'an signed the agreement, which was also witnessed by President Asif Ali Zardari. Under the agreement, China will provide technical assistance to Pakistan in the field of hydel power generation. Earlier, the President had a meeting with Li Yong'an in which he expressed his desire for cooperation in the field of hydel power generation. President Zardari said the basic purpose of his visit here is to study the Chinese model of power generation and development in agriculture sector. Li Yong'an said the corporation was ready to extend all possible assistance to Pakistan to overcome its energy challenges. He also briefed President Zardari about the salient features of the dam which is the world's largest having a capacity of 22500 megawatt. Later, President Zardari visited to the site of the dam.