| 首 |
shǒu yào | the most important / of chief importance |
| 首 |
shǒu | head / chief / first (occasion, thing etc) / classifier for poems, songs etc |
| 要 |
yāo | (bound form) to demand; to coerce |
| 要 |
yào | to want; to need; to ask for / will; shall; about to / need to; should / if (same as 要是) / (bound form) important |