According to CoinMeta, and as reported by BHP Billiton, during the 9th China International Import Expo, BHP Billiton officially signed a memorandum of understanding for the purchase and sale of cathode copper with Shanghai Guomao Holdings Co., Ltd. (referred to as "Guomao Holdings") at a centralized signing event organized by the Shanghai State-owned Assets Supervision and Administration Commission. Subsequently, both parties also signed a memorandum of broad cooperation at BHP Billiton's booth. Building on the existing cooperation in cathode copper trade, the two sides will further deepen their strategic collaboration and actively expand areas of cooperation in bulk commodity trading, green and sustainable development, as well as investment and financing.