Popular SBS dating show If You Are The One has been forced to skip over 100 episodes due to a participant's off-screen drug conviction.

A years worth of the Chinese cult hit's episodes have not been made available to international networks after celebrity screenwriter, novelist and TV presenter Ning Caishen (real name Chen Wanning) admitted he took methamphetamines on Chinese national television in June 2014.

Taped police confession of Ning Caishen. Credit:CNTV

​"I bought drugs for three times in the past seven months, each time I spent 1,000 yuan ($158). I took drugs whenever I need to write intensely," Ning told the policemen in the recorded trial according to English/Sinha. He also served a 10 day sentence for the drug use.

SBS told viewers of the change via Facebook saying "all the girls will be new to Aussie audiences".

Caishen was due to appear as a guest commentator on the show which has succeeded despite being deemed "vulgar" by a ruling of the Communist Party.