Grab that crab

'Tis the season for hairy crabs in China, and kitchen crews have gone into overdrive to meet popular demand for the delicate crustacean, Xu Junqian reports.

Zheng Xianchao doesn't look like a kidnapper, but his tied-up "victims" might tell you otherwise.

The 28-year-old Shanghai native arrives at the renowned Wang Bao He restaurant before 7 every morning and spends the next two hours selecting 1,000 hairy crabs from the back of a black van, flanked only by his shifu (master).