YINCHUAN, Sept. 22 (Xinhua) -- Chinese Vice President Li Yuanchao has called for efforts to strengthen and improve the Communist Party of China (CPC)'s leadership over the reform on the work involving mass organizations.

During a tour of northwest China's Ningxia Hui Autonomous Region from Tuesday to Thursday, Li said Party committees at various levels should take a leading role in the reform.

Efforts should be made to solve existing problems in mass organizations and related work through the reform, and grassroots mass organizations should be strengthened to build closer ties with the broad masses, Li said.

Mass organizations represent people from different lines of work or age groups, such as trade unions, women's groups and youth leagues.