Vietnamese entertainment company Lang Van had filed a copyright infringement lawsuit against VNG Corporation and International Data Group, the US-based investors of Zing, a popular Vietnamese file-sharing site. The case was filed in the United States District Court for the Central District of California on January 22.

California-based Lang Van, owner of the world's largest collection of Vietnamese music, is seeking financial damages for copyright violations, accusing the Vietnamese file-sharing site of putting out 3,000 of its recordings and 600 albums for free streaming or download on its website in order to generate traffic and advertising revenue. Lang Van has never received any financial compensation from Zing for the use and distribution of this copyrighted material while the latter continue to make profit from. They claim to have previously repeatedly sought Zing to pay royalties or otherwise take down the content from its page.

According the lawyer representing Lang Van, VNG Corporation and IDG will be looking at $150,000 per infringement, total damages for all 3,000 violations could amount to a maximum of $450 million should the judge rule in the favor of its client.

Zing is allegedly one of the largest IP-infringing websites in Asia and currently facing 590 infringement cases. Many organizations have denounced its practiced including the Recording Industry Association of America (RIAA), the International Intellectual Property Alliance (IIPA), the International Federation of the Phonographic Industry (IFPI). It is currently on the list of the United States Trade Representative for "Notorious Markets List". Though Vietnam has laws intended to protect intellectual property rights, its enforcement is somewhat weak.

There is no formal statement from VNG's head in Vietnam to date while IDG Ventures Vietnam recently released a statement saying that it had sold its shares in VNG in 2009.