M&A transactions involving large scale target companies or investors are growing rapidly in recent years as valuations of target companies are constantly setting new records. Large scale M&A transactions usually have more complicated deal structures and special rights for different investors, the parties to such transactions may therefore often misunderstand or be confused about whether a transaction has triggered a merger control filing. Our lawyers have tried to summarize in this memorandum several major circumstances where a merger control filing obligation in an M&A deal could be easily neglected and to share some of our practical recommendations. We hope this would be a helpful effort for our clients and friends. (Full text in Chinese only)