From May 19 to 22, 2004, the IX International Congress of Dermatology was held in Beijing , China . Prof. Rong Xiang Xu gave a keynote lecture on this congress titled as “Skin Regeneration In Situ and In Vivo”. Many scientists and doctors were shocked by results of the technique. They hoped to cooperate with Prof. Xu in this field and believed that regeneration in situ was an ideal approach to save more patients.