Is this MacBook charger counterfeit?
It is not in itself evidence of a fake, no. It is common for Apple to have the name of the production facility written on the power supply. For example my 85W power supply has "Delta Electronics (Jiang Sui) Ltd." written on it in the same place.

An image search on Google for the 60W adapter also reveals that other power supplies have the same writing on it as yours.

However, it is not a 100% proof that your charger is original, as anyone could in principle write such texts on a charger. It would obviously be illegal however.