Answer:
its uniqueness and the story behind the painting's beauty
Step-by-step explanation:
people can't paint without any topics even if we do start without thinking we think what we will do next to make it intresting.
The nepalese painting's were quite famous in the ancient time as well.
in my prospective the nepalese painting's had the unique and natural colours even hand made.
so when the chinese king ( sorry I don't know their names) wanted to marry the neplese princess ( the colours and the painting's had already been developed in nepal ) the father of the nepalese princess gave the famous painting's as a gift to his son in law ( in nepali the tradition of giving gifts to their son in law is called " daijo" but this tradition refers from culture to culture so it's not quite same for others even tough are related from blood ) the painting that the king gave his son in law was quite famous there in china so the richer families came to see the painting's ordered their private painters to copy the exact painting but the colours that the people had in that era was different so even tough the painting's were same the colours were different.
then from that eventual day the chinese era started to paint in the same colours that they had so even tough chinese and neplese culture are different they are some somehow connected in the history.