What is the implementation mechanism of clicking and refreshing data, such as toutiao.com and her community?

1. in Toutiao.com, each pull-down and refresh data is different. Normally, the news will be stored in a table, and the data will be put before the earliest, and the data refresh the top will not change. The same is true for her community. (Do not discuss Toutiao.com's recommendation algorithms) 1. in Toutiao.com, each pull-down and refresh data is different. Normally, the news will be stored in a table, and the data will be put before the earliest, and the data refresh the top will not change.
The same is true for her community. (Do not discuss Toutiao.com's recommendation algorithms)

Reply content:

1. in Toutiao.com, each pull-down and refresh data is different. Normally, the news will be stored in a table, and the data will be put before the earliest, and the data refresh the top will not change.
The same is true for her community. (Do not discuss Toutiao.com's recommendation algorithms)

I personally think it should be the paging principle. the first pull-down refresh corresponds to the first page, the second page, and the back-end queries the database based on the number of times.