15. Commitments and contingencies (a) Operating lease commitments The Group leases office premises under non-cancellable leases. Rental expenses under operating leases for the years ended December 31, 2009, 2010 and 2011 were RMB 6,806,086, RMB 8,508,838, and RMB12,267,009, respectively. In addition, the Group also leases internet bandwidth under non-cancellable leases. Internet bandwidth leasing cost for the years ended December 31, 2009, 2010 and 2011 were RMB 74,385,535, RMB 103,634,434 and RMB 180,244,594, respectively. As of December 31, 2011, the Group had remaining outstanding commitments in respect of its non-cancellable operating leases as follows: RMB 2012 155,549,771 2013 47,856,122 2014 23,632,573 2015 16,122,911 2016 32,010,185 275,171,561 (b) Contingencies The shareholders of VIEs maybe involved in personal disputes with third parties that may have adverse effect on their respective equity interests in the relevant VIEs. On October 11, 2010, the ex-wife of Mr. Gary Wei Wang, the founder and chief executive officer of the Company who holds 95% of the equity interests in Quan Toodou, initiated a lawsuit against him with a local court in Shanghai, PRC and claimed for the division of 76% equity interest of Quan Toodou held by Mr. Wang, which she alleges to form part of the community property during their marriage. The dispute has been settled by the court on June 10, 2011. The detailed evaluation and assessment of the impact has been included in Note 2(b). The Group is subject to claims and litigations, which may arise in the normal course of business. As of December 31, 2011, there were a total of 47 lawsuits against the Company with the total claim amount of RMB 3.4 million. These claims relate to the allegations of infringement of copyrights of others as well as other claims of liability. Based on the management s assessment of each lawsuit and advice from external PRC litigation counsel, the Group believed that it is probable that the Group could incur a loss with respect to some of these litigation