The subject in a subject-predicate sentence in Chinese is naturally of definite reference:
Huǒ chē dào dá zhōng diǎn zhàn。
The train arrived at the terminal station.
Hái zǐ jīn tiān guò shēng rì。
It is the child’s birthday today. (lit. The child today has/passes birthday.)
One cannot normally say:
*Yī liàng huǒ chē dào dá zhōng diǎn zhàn。
(lit. A train arrived at the terminal station.)
 Yip, P. C., Rimmington, D., Xiaoming, Z., & Henson, R. (2009). Basic Chinese: a grammar and workbook. Taylor & Francis.