In March 2020, what business service did China Unicom provide?

Parcel handling business. In March 2020, users maintained the package discount, which is the package business under the voice traffic contract of China Unicom. After applying for changing the package, it will take effect at 0: 00 on the start day of the next billing cycle. Customers can change the package many times in the current billing cycle, and the change result will be subject to the last time; You need to re-select the inside and outside after changing the package.