Meaning of mǒu rén:
某人
someone; I (self-address after one's surname)
Wǒ kàn dào mǒu rén zài gōngyuán lǐ sànbù.
我看到某人在公园里散步。
I saw someone walking in the park.
Lǐ mǒu rén jīntiān yào qù kāihuì.
李某人今天要去开会。
Li is going to a meeting today.
a certain person; some people
Yǒu yītiān, wǒ yùdàole yī gè shénmì de mǒurén.
有一天,我遇到了一个神秘的某人。
One day, I met a mysterious person.
Jīn tiān wǎn shàng mǒu rén huì lái bài fǎng wǒ men.
今天晚上某人会来拜访我们。
Tonight, some people will come to visit us.