How did Hinduism and Buddhism spread to Southeast Asia?

HINDUISM
Hinduism came to Southeast Asia around 1st century CE. It is believed that Hindu priests from India were invited to the courts of ancient Southeast Asian rulers to teach Indian culture.

BUDDHISM
Buddhism came to Southeast Asia c. 300 CE. It was borught by Indian and Chinese traders as well as the Buddhist missionaries who travelled with them.

IMPACTS ON RELIGION

Hinduism, Buddhism and Islam had a great impact on the way the people of ancient Southeast Asia lived. These religions guided many ancient Southeast Asian rulers in the way the they governed.
In ancient China, the people of ancient Southeast Asia did not entirely follow the teachings of their new religions and abandon their older beliefs. Instead, they combined their older beliefs with the teachings of their new religion.
In Southeast Asia, the kings no longer saw themselves as gods but they continued to use emblems of kingship.

It has shaped the lives of people in Southeast Asia today.

INDIA : maritime trade

What was the result of this interaction?

The Indus people borrowed the idea from Mesopotamia of using seals to mark their goods. This is bacause their seals were found to be familiar.