Thanks to the support and encouragement of the Chinese government over the past decade, China’s platform economy has made rapid progress. However, as some large-scale big-tech companies grew into super-platforms, they formed a structure that dominated the market and their behaviors of “choose between two” became widespread. On February 7, 2021, the competition authorities promulgated the <Anti-Monopoly Guidelines on the Platform Economy of the Anti-Monopoly Committee>, which ended the era of unlimited policy support for Chinese platform companies and entered an era of strong management supervision. The platform’s forced act of “choosing between two” is currently receiving the most attention among the platform's anti-competitive acts, and three routines are currently being used simultaneously in China to regulate this. The first is legislation, and the second routine is the strong administrative punishment of competition authorities. In addition, China is actively applying the means of corporate interviews to suit the characteristics of its social system. These measures have sufficiently shown the attitude of competition authorities and serve as a preventive and warning to other platform companies. There are still problems to be solved, for example, whether to view each side as a separate market or a unified market in defining related markets in a two-sided market (multi-market) formed by platform is the first problem. In addition, legislation is inconsistent in the analysis method, creating confusion in the enforcement law in practice. Then, there are still many difficulties in determining the platform’s dominant market position, and due to the confidentiality and technology of some “Choose between two” actions adopted by the platform, there will be many difficulties in proving them and obtaining damages.

시장지배적 지위의 남용을 인정하기 위해서는 우선 사업자의 시장지배적 지위가 인정되어야 하고, 이러한 시장지배적 지위를 인정하기 위해서는 독점위반혐의와 관련된 시장을 획정해야 한다. 중국 ｢반독점법｣에서는 관련시장을 획정하는 방법으로서 대체성 분석과 가상적 독점사업자 검정을 일반적인 방법으로 채택하고 있다. 그렇지만, 플랫폼의 발전과 함께 양면시장이 형성되면서, 관련 시장을 획정하는 일반적 방법의 분명한 한계가 드러나게 되었다. 즉, 양면시장의 교차 네트워크 외부성과 비중립적이고 편향적인 가격구조 때문 에 관련시장을 획정하는 일반적인 방법이 적용되기 어려워진 것이다. 따라서 중국의 반독점기구와 법원은 일반적 방법에 대한 새로운 조치를 통하여 양면시장에 적용될 수 있는 관련시장의 획정 방법을 정립하였다. 이 글에서는 이러한 조치들을 살펴보고 양면시장의 관련시장을 획정하는 바람직한 방법에 대해서 논의한다.