+7 = 9

ㄒㄧˋ

<a href="./#~系">系</a>
ㄒㄧˋxì
  1. 關係」。
  2. 捆綁
    文選)​」。
to connect, to relate to, to tie up, to bind, to be (literary)​
System, Fakultät, Abteilung (S)​