SHANGHAI - Anti-drug authorities in Shanghai have joined hands with online game developers to develop and include anti-drug advertisements in games to better inform youths of the harms of drugs.

It is the first such move for anti-drug officers to include online games, which have become very popular among Chinese youngsters, officials said.

As of last month, more than 50 online game operators, including industry leaders such as Shanda Entertainment and Giant Online, have promised to take part in a competition launched by the anti-drug commission of Shanghai to make anti-drug public service advertisements at their own expense.