Charismatic rock group Glay is embarking on a mission that even the gray generation of Japanese leaders think very difficult, if not impossible: to fine-tune the country's often rocky ties with China and keep them humming along.

The million-record selling group will tour China next summer as part of events commemorating the 30th anniversary of diplomatic ties between the two neighbors, according to sources closely involved in organizing the events.

Glay will hold concerts in Beijing, Shanghai and Hong Kong between July and August, the sources said.