For the whole container, it is not what THC contains, but the shipping company's expenses, including THC, document fees, booking fees and so on.
That is to say, THC is a kind of detail, but its name is dock operation fee.
For LCL, THC is one of the charges at the port of destination.
The difference is that FCL is the operating fee charged by the shipping company, while LCL is the operating fee charged by the agent.