Visiting Chinese Foreign Minister Yang Jiechi and Foreign Minister Masahiko Komura agreed Thursday in Tokyo to do their utmost to make Chinese President Hu Jintao's visit a success as they officially announced his May 6-10 trip.

Yang is in Tokyo for four days to pave the way for Hu's visit as the two countries explore ways to mend a bilateral relationship once badly frayed by history issues and still prone to nationalist sentiment from both sides.

However, whether Yang can succeed at generating a friendly atmosphere has been put in doubt by the China's bloody crackdown on Tibet.