BEIJING, July 23 (Xinhua) -- Senior Chinese security official Meng Jianzhu urged efforts to maintain social stability in Tibet, saying it is vital to national security.

Meng, head of the Commission for Political and Legal Affairs of the Communist Party of China (CPC) Central Committee, made the remarks during a five-day visit to Tibet which ended on Tuesday.

Local officials should have a profound understanding of the long lasting nature of the anti-secession efforts, and always take them as the primary political task, he said, vowing a harsh crackdown on separatist activities or terror attacks.

During the inspection, Meng called on Buddhist monks to make contributions to ethnic unity while visiting Jokhang Temple and other well-known religious sites.