With the coming of mobile internet era, Giants in the different industry begin to compete face by face. This teaching case presents the event of charging for WeChat in China context to delineate the new challenges that Online Service Provider and Mobile Network Operator will face. The case describes the origin of the event, development of WeChat from inception to today, the impact of WeChat on China Mobile growth, current dilemma and disputes that all stakeholders involved. This case can help students gain more insights on the current debate around Net Neutrality.