Famed Chinese scriptwriter Chen Wanning (L), better known as Ning Caishen, has been detained for using meth, Beijing police said Thursday. Chen, 39, confessed he had been taking ice since December last year. He is best known for writing the sitcom “My Own Swordsman.” Meanwhile, media reported Thursday that famous director Zhang Yuan (R), 50, had also been detained by Beijing police for using meth. Zhang is a member of the so-called “six-generation” filmmakers, known for his non-mainstream independent works.SD-Agencies