5x7(7x5) is smallest I could find for Japanese, it probably won't work for actual Chinese language though https://booth.pm/ja/items/1477300 https://booth.pm/ja

5x7(7x5) is smallest I could find for Japanese, it probably won't work for actual Chinese language though https://booth.pm/ja/items/1477300 https://booth.pm/ja/items/1477300