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Trade to Russia through Manzhouli, China's largest land port in the northern Inner Mongolia Autonomous Region, topped $8.43 billion in 2007, up 27 percent from the previous year.

Imports from Russia through the port totaled $7.44 billion, up 21.4 percent from the previous year. Exports to Russia increased 96 percent to $990 million in 2007, according to Manzhouli customs on Thursday.

Crude oil imports contributed to the trade boom. China imported more than nine million tons of crude worth $4.55 billion via Manzhouli customs in 2007. It accounted for more than half of the total trade revenue.

The imports mainly consisted of wood, crude oil and chemical products, while exports were mainly mechanical and electrical products, vegetables, fruits and textiles.