Do a slight backcomb at the crown to conceal the more visible part of the unwashed hair.

顶稍稍向后梳一下，遮住没洗过中比较显眼部分。

The best option would be to slightly backcomb the hair at the roots to get extra volume, and then secure it in a shell or a bun.

最法是将根处稍稍向后梳，让更蓬松，然后把它扎成髻。