How far did the mongol empire extend

The Mongol Empire streached from China all the way to Eastern Europe.

Beginning in the Central Asian steppes, the Mongol Empire stretched from Eastern Europe to the Sea of Japan, covering large parts of Siberia in the north and extending southward into Southeast Asia, the Indian subcontinent, the Iranian plateau, and the Middle East. At its greatest extent it spanned 9,700 km (6,000 mi), covered an area of 24,000,000 km2 (9,300,000 sq mi), 16% of the Earth's total land area, and held sway over a population of 100 million. 

He gathered information from primary sources.