上下的话，必须看到头顶到鼻子的部位，如果只是看到眼睛以下部位的话，无效。

When looking from top to bottom, he must look at least from the head to nose.

youdao

上下的话，必须看到头顶到鼻子的部位，如果只是看到眼睛以下部位的话，无效。

When looking from top to bottom, he must look at least from the head to nose.

youdao