What does Xiaomi Mobile Card 1 Yuan mean?

Introduction of wayward mobile phone card package:

One yuan free package 19 yuan/month, including 60 minutes of domestic calls, 0. 15 yuan/minute of domestic calls outside the package, free of charge for domestic calls, 0. 1 yuan/article, and the traffic is calculated on a daily basis without spending money.

Unicom 1 yuan/day's national traffic is unlimited on the same day (20G speed limit 1Mbps, 100G speed limit 256Kbps), and it will automatically resume the next month.

Telecom 1 yuan/day national traffic is unlimited on the same day. After reaching 30G, it will be charged at 1 yuan /500M/ day.