Meaning of zài nèi:
zài nèi
在内
Preposition
(included) in it; among them
Huìyì cānjiā zhě gòng 20 rén, xuéshēng yě zài nèi.
会议参加者共20人，学生也在内。
There are 20 participants in the meeting, students {included}.
Wǒmen bān de xuéshēng yǒu 20 gè, qízhōng yǒu 5 gè shì wàiguó rén, zài nèi.
我们班的学生有20个，其中有5个是外国人，在内。
There are 20 students in our class, among them 5 are foreigners.
