On-site copper, on-site trading, traditional gesture trading. The time period is short. 7: 30 pm Beijing time-12: 00 pm.
LME Copper 03 refers to over-the-counter trading. Usually from 8: 30 am to 2: 00 am the next day, Beijing time.
Lmes_ Cu 3 refers to electronic disk. It is the same as the OTC market, but it belongs to the quotations of different brokers. Just more specific, more timely and more detailed.
On-site and off-site transactions are the same in overlapping time periods. However, the venue ended early.
The level is limited, which can only explain so much.