Why ancient Mongolian Civilization spread as far as Europe but Chinese Civilization did not?

Mongolians did not fear alien civilizations whereas Chinese did.

BTW Mongols were our ancestors in some way, see my profile data from iGenea.

Many because it was Mongolian civilization and not Chinese.

One good thing to come from the Mongol empire was that people could travel freely from one side of Europe to China.

Most tribes of the Chinese never invaded others except for the Mongol tribe.

Because of the way the people lived. Historically, Mongolians were travelers/nomads. Chinese were farmers/settlers.