The assembly of the chain requires a careful reading of the manual. We must spend a good half hour.
The chain wears out pretty quickly: purchase a replacement chain from the order.
Please note that the chain is lubricated thanks to a small oil reservoir in the chainsaw. But the oil is not supplied with the chainsaw. Also buy a bottle of oil Bosch (Special Chainsaw) from the command also.
In total, add thirty euros for use upon receipt.