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What does it mean that there is a code for the parking space on the road in Tongchuan New District, Shaanxi Province?

There is a parking space code on the road in Tongchuan New District, Shaanxi Province.

If it is the number on the ground sign, it generally means limited parking. The number is 19-6, which should be 19 on the first day (that is, 7 pm), and parking is allowed at 6 am the next day. Otherwise, it is a fine for posting. If it's just the numbers on the ground, the letters in front represent the zones, and the numbers at the back are the numbers, which is convenient for identifying each parking space and for car owners to find parking spaces.