What does the word NT mean in international law? thank you

NT refers to national treatment, also known as equal treatment, which means that the host country should give foreigners the same civil rights status as its own citizens. The scope of application of national treatment usually includes: domestic taxation, transportation, transit, port ship treatment, ship rescue in distress, trademark registration, invention application, patent right, copyright, civil litigation right, etc. Fishing in territorial waters, land purchase and retail trade are not included.