What do east Asia and southeast Asia share?

Many East Asian and Southeast Asian countries were once Buddhist empires. What is now China, Mongolia all the way south into Myanmar, Thailand and Indonesia were once Buddhist and Hindu empires....

slanty eyes

There are more than seven countries of southeast Asia and east Asia. Here are seven countries Cambodia, Laos, Thailand, Indonesia, Singapore, Philippines, and Vietnam.

there are a lot of countries in Asia mostly small one such as hitocuchii and trapinasia and chinni.

Because it is in the part of Asia in the most South East Part