Last year, more than 400 local companies in Dongguan, a major manufacturing city in China's southerly Guangdong province, went bankrupt as China's economy slowed. In stark contrast, one local bakery company - Dongguan Kam Tai Foods - earned CNY1.1bn (US$177.1m) in revenue and it is expecting to see sales grow 20% in 2015. Wang Fangqing investigates Kam Tai's recipe for success.