Four Russians have been charged with smuggling timber valued at $3m per month into neighbouring China. The four are accused of using dozens of different companies and fake documents to smuggle 150 freight cars of lumber every month. Police believe the four are part of a much larger smuggling ring. Trade across the border is driven by huge Chinese demand for raw materials, and illegal trade increased dramatically after the collapse of the Soviet Union. Illegal timber trade from Russia to China in 2011 was valued at $1.3 billion, accounting for around 10 million cubic metres of logs and sawn timber.