Hello, maybe you can use some different complication or switch to English locale? You can try using Complications Suite where you can customize date format properly so it fits complication slot boundaries. We hope that you can update your review in the future.
https://play.google.com/store/apps/details?id=com.weartools.weekdayutccomp
新機能
v1.2.1 • LONG_TEXT complications hotfix
v1.2.0 • completely reworked complication slots
v1.1.6 • replaced fixes steps bar with RANGED_VALUE complication slot • removed bottom right LONG_TEXT because there is 8 custom complication slots limit • hugely optimized & minified watchface.xml
v1.1.5 • steps button hotfix ...
NOTE: Please re-install watch face in case you're experiencing issues with custom complications after recent update.