Answer:
1. Before Buddhism spread in China, there were indigenous Confucianism and Taoism in that land. However, Confucianism could not be regarded as a religion in its true sense, and the influence of Taoism was rather limited.
2. They are all ether part of India or China or they all fell and came back with a new name. For example, China broke 4-5 time and India broke 2-3 every time with a different name/like the Guptas Empires or the Tamal Kings.
3.The way people interact with each other, and the types of relationship they form, depends greatly on the dominant cultural belief systems. Many Asian religious and philosophical traditions originated in India and China and spread across Asia through cultural diffusion and the migration of peoples.