LHASA, Sept.8 (Xinhua) -- China will deepen the battle against separatism and crack down on all kinds of separatist activities, top political advisor Yu Zhengsheng said Tuesday at a ceremony marking the 50th founding anniversary of the Tibet Autonomous Region.

The fight against separatist force will be carried out according to law to firmly safeguard the national unity and Tibet's stability, said Yu, chairman of the National Committee of the Chinese People's Political Consultative Conference.