One of the key strategic decisions of multinational enterprises (MNEs) is its method to enter a foreign market. However, previous studies have mainly investigated MNEs of developed countries. Moreover, there is no active research on the methods of MNEs of developing countries in terms of entering foreign markets. This study aimed to investigate the role of the isomorphism in foreign market entry strategies used by firms of developing countries. The firms chosen for analysis consisted of those in China, and the analysis period was from 2000 to 2015. We collected 2,370 pieces of OFDI data by firm from the Zephyr database, the investment country economic indicators of the Chinn-Ito Index, and the exchange rate and inflation data of the World Development Indicators. According to the results, for MNEs in developing countries, isomorphism was shown in certain entry methods of leading investment firms. However, firms with ample available resources, such as state-owned and listed firms, preferred having a wholly owned subsidiary over the entry method of existing firms.