China and Japan vowed on Saturday to improve relations ahead of a visit by Chinese premier Wen Jiabao to Japan in April, Reuters reported. The agreement was the conclusion to a three-day dialogue between the two countries, the latest in a round of talks aimed at mending fences between the major economic powers in the region. "The two sides discussed building strategic, mutually beneficial ties and had frank and in-depth exchanges of views on how to maintain the sound momentum of improving and developing bilateral ties," the official Xinhua news agency said, citing the Chinese foreign ministry. The talks were headed by Chinese Vice Foreign Minister Dai Bingguo and Japanese Vice Foreign Minister Shochiro Yachi.