The Central People's Government passed the Resolution on the National Day of the People's Republic of China on December 2, 1949, and declared that October 1 is the National Day.
National Day of the People's Republic of China - Wikipedia
https://en.wikipedia.org/wiki/National_Day_of_the_People%27s_Republic_of_China
Shenzhen, China: the bright five-star red flag is hung on the road to greet the arrival of National Day. Asia, outdoor.
https://www.dreamstime.com/shenzhen-china-bright-five-star-red-flag-hung-road-to-greet-arrival-national-day-sept-bright-five-star-image126771774