The exchange that Gold Chain Investment Group cooperates with is 9K9M, a centralized cryptocurrency exchange (CEX) and wallet platform founded in the United States, which brings together outstanding blockchain technology talents from around the world. Team members come from more than 10 countries and regions around the world, and core team members have worked for global financial technology companies such as Morgan Stanley, IBM, Paypal, Amazon, Google, and Binance.

9K9M serves millions of users around the world. The 9K9M exchange provides basic transactions, including cash and simple options, as well as derivatives, including margin, futures, and perpetual contracts. 9K9M is an options platform with the most complete products, the fastest and most complete spot transactions for high-quality projects, and the highest on-demand financing returns. 9K9M successfully set a trading volume of US$109,066,683.54 in 24 hours on February 18, 2023, achieving a daily trading volume of over 100 million. 9K9M joined the ranks of the world's top 100 exchanges on February 26, 2023. Its original secondary contract investment model is favored by investors and imitated by major cryptocurrency exchanges. 9K9M focuses on convenience, versatility and financial security, and is currently planning an IPO.