Does Unicom eSIM No.1 dual service support watches to send short messages?

China Unicom's "One Number Two" service means that users can add a terminal as an accessory (secondary card) under their mobile phone number (primary card) account and package. When the mobile phone and the auxiliary terminal * * * use a mobile phone number (the terminal equipment number is hidden and the main card number is displayed), the two terminals vibrate together, and any terminal can make a phone call, but no phone call can be made between the main terminal and the auxiliary terminal. The auxiliary terminal is not supported to open SMS for the time being.