President Asif Ali Zardari will leave for China on February 20 for a three-day visit which has been declared as highly important by China's ambassador in Pakistan Luo Zhaohui. This will be President Zardari's second tour of China during four months. Prime minister Syed Yousuf Raza Gilani has also toured China in last September. Diplomatic sources said that President Zardari is touring China as per his announced commitment.