President Asif Ali Zardari left here Friday on a five-day official visit to China with a compact delegation aimed at enhancing ties in trade, agriculture and energy sectors. This will be President Zardari's second visit to China in four months and is expected to ink agreements and memorandum of understandings to boost cooperation in these vital sectors. The President who is accompanied by Chief Minister Sindh Syed Qaim Ali Shah, Advisor on Petroleum Dr Asim Hussain, Advisor on Water and Power Kamal Majidullah, Chairman BOI Saleem Mandviwala, besides Foreign Secretary Salman Basheer, Chairman Wapda and Chairman Pakistan Agriculture Research Council.