What do the red and green dots on the high-speed rail seat represent?

After the park was closed in March 1 1, the residents around Minhang Sports Park waited for 109 days, and finally ushered in the resumption of opening today. At 8 o'clock in the morning, many people took their families to scan the code and walked into the garden one after another with the temperature to feel the breath of nature. Even photographers with long guns and short guns aim at the lotus pond of Jinxiu Lake in the sports park. At the end of the park, citizens can only enter the park by wearing masks, holding a 72-hour negative nucleic acid report, scanning digital sentry posts and placing codes or registering personal information (with identity documents). The amusement facilities in the park are closed, and the daily limit is 15000 people.