For starters, it’s important to determine the overall need for Chinese economics in raw round timber. Based on publicly available data, it needs about 170 million cubic meters of industrial wood per year. The Chinese cover a hundred cubic meters by cutting their own forest, and about 30 million more are imported from the USA, Canada and Norway.
The remaining 40 million cubic meters, most likely, are in Russia, although official data show only 22 million cubic meters. However, even if we assume that Russia somehow supplies the eastern neighbor with 40 million cubic meters of round timber annually, it will take us about 800 years to noticeably thin out our Siberian forest.