Next week the Chinese Communist Party will hold a key annual meeting in Beijing with the focus on discipline and conduct.

China's leaders say corruption is a life and death issue for the ruling party, and to steel its nearly 90 million members against temptation, they are sent on educational visits to the pilgrimage sites of the revolution.

The BBC's China editor Carrie Gracie got rare access to tag along on one such tour in Chongqing, southwest China.