Yes, true china should take back siberia as ru is poor! They need china money and investment! Ru peo mostly moved to moscow alrdy!China can take back Siberia from Russia if it is militarily strong enough to do so. UN laws today prohibit selling away of sovereign soil. So countries get around this by leasing their territory to foreign powers for 99 year lease. They learnt it from our PAP HDB system. Majulah PAP!