Also they have supplied aid to Italy and Spain (although also screwed up with medical supplies to Spain).
The "screwing up" of medical supplies in Spain is due to the incompetence and corruption of the Spanish government. They tried to arrange directly for the buying of supplies, bypassing the common importation route used by health officials. Unfortunately, and despite the repeated warnings of the Chinese embassy and many hospital managers, they ended up buying the supplies to a non-homologated Chinese startup, so the supplies cannot be used.