Taxis come in three denominations: red, green and yellow. Red taxis can go anywhere. Green taxis are only allowed outside the SEZ and yellow taxis only within the Shenzhen. Flag fall for taxis costs ¥12.50 (¥16 from 11 pm to 6 am), with a ¥4 fuel surcharge and ¥2.40 for every additional kilometre. Make sure the driver starts the meter. You can also use the taxi cab hailing service with WeChat or Alipay (like the Chinese version of Uber).