President Asif Ali Zardari and President Hu Jintao hold a one on one meeting here Wednesday. The two leaders discussed ways to boost Pak-China bilateral relations in all spheres, besides regional and international situation. The exclusive meeting was followed by a delegation level meeting. Zardari will sign agreements with China on business and trade during the visit to Beijing that kicked off today, according to China's Foreign Ministry. But both sides were mum on whether they planned to discuss nuclear energy cooperation. The weeklong visit is Zardari's fifth since he came to office in September 2008, underscoring the close diplomatic, military and commercial ties between the neighbors.