Meaning of yī biān:
一边
one side; either side
Tā xǐhuān yībiān zuò zuòyè, yībiān tīng yīnyuè.
他喜欢一边做作业,一边听音乐。
He likes to do his homework while listening to music.
Tā xǐhuān yībiān chànggē yībiān tiàowǔ.
她喜欢一边唱歌一边跳舞。
She likes to sing and dance at the same time.
on the one hand; doing while
Tā yībiān zuò fàn, yībiān tīng yīnyuè.
他一边做饭,一边听音乐。
He is cooking while listening to music.
Tā xǐhuān yībiān tīng yīnyuè, yībiān gōngzuò.
他喜欢一边听音乐,一边工作。
He likes to listen to music while working.
on the other hand
Tā zhèngzài gōngzuò, yībiān xiǎngzhe jīntiān wǎnshàng de jìhuà.
他正在工作,一边想着今天晚上的计划。
He is working, while on the other hand thinking about tonight's plans.