parallel conjunctives: 一边yī biān/一面yī miàn…一边yī biān/一面yī miàn…
他一边/一面吃饭,一边/一面看书。
Tā yī biān /yī miàn chī fàn ,yī biān /yī miàn kàn shū 。
He ate as he read./He read while he ate.
[1] Yip, P. C., Rimmington, D., Xiaoming, Z., & Henson, R. (2009). Basic Chinese: a grammar and workbook. Taylor & Francis.