President Hu Jintao has warned China's incoming leaders that corruption threatens the ruling Communist Party and the state, acknowledging that public anger over graft and issues like environmental degradation had undermined the party's support and led to surging numbers of protests.

Dongguan is one industrial Chinese city, which had been called "the factory floor of the world", that is struggling to sustain economic growth with major budget deficits.

Some labour workers there say that their employers have held up months' worth of pay.

Divya Gopalan reports from Hong Kong. 

Source: Al Jazeera