This topic examines the currencies and forms of foreign exchange market transactions. At present, the inter-bank foreign exchange market provides two trading modes: centralized bidding and bilateral inquiry, and supports spot trading of RMB against 18 foreign currency, forward and swap trading of RMB against 16 foreign currency, currency swap and option trading of RMB against 5 foreign currencies (USD, EUR, JPY, HKD and GBP), spot, forward and swap trading of 9 foreign currency pairs, and 3 foreign currencies.