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A number of canteens, some of them warehouse-sized, cater to the appetites of the thousands on site. At least two serve up authentic Indian curries to the large South Asian staff, but the largest have a general Chinese menu. There are also specialist canteens for those wanting regional Chinese cuisine.
Meals cost between 10 and 15 rmb (£1-£1.50) on average, and people pay using an Oyster-like micropayment card that they load money onto.
Image: Karen Friar