Graffiti in China on the rise with artists even profiting from commissions – but they have to play by the rules and avoid criticising the government

• Hit shows like Street Dance of China are helping drive interest in graffiti, but artists say more security cameras mean the underground element is disappearing
• One 67-old-year retiree whose hobby is photographing Beijing’s graffiti has had more than 300 of his pictures turned into a book