When we say London copper, we mean 3 LUN copper. Represents the average price of the last three months, which can be understood as the middle month, so it has no expiration month, so its graph is always continuous. Therefore, we will only see 3 LUN copper, but there are no 4, 5, 6 LUN copper and so on.

Copper belonging to London, England is traded in tons and quoted in US dollars.

Meijing Copper is a copper futures contract listed in COMEX (the New York Mercantile Exchange), commonly known as "Meijing Copper"; Luntong is a copper futures contract traded on LME (London Metal Exchange), commonly known as "London Copper".

Their prices are basically the same. What you see is different because COMEX's copper futures contract is traded in pounds and quoted in cents.