written and directed by Andreas Ewels, Norbert Porta ; production ZDF, Alexandre Kegler, Sigrid Beck ; produced by Norbert Porta Sciencedocu on behalf of ZDF
presented by Jiao Li for Film Ideas in conjunction with CCTV ; chief producers, Xu Wenguang, Yan Weiyi ; general director, Li Chencal ; scriptwriters, Wan Jianying, Li Guoping