Why are the small park signs outside Wuhan different in color?

The different colors of the small garden pass outside Wuhan are used to distinguish the times and times of the garden. There are two days in the small garden outside Wuhan, and there are eight games in * * *, so the color of the small garden card outside Wuhan is different, so color printing is chosen when printing. Visiting the small garden outside is mainly to examine the children's self-care, autonomy, ability to get along with peers, concentration, ability to listen to instructions and execution, and does not involve intellectual investigation.