@KCAU Nuc is short for Nucleus - being a smaller box of bees with usually a mated queen, Brood in all stages (BIAS) and food/nectar/pollen.
Basically it is a small bee hives worth of bees that needs building into a full hive.
If you are in China you need to contact a local bee keeper to help you.
You should join a local group or club to help get you started. Do you have any bees?