Usages of yìfāngmiàn
一方面 他 想 出国 留学， 一方面 又 担心 学费 太 贵。yìfāngmiàn tā xiǎng chūguó liúxué, yìfāngmiàn yòu dānxīn xuéfèi tài guì.
On the one hand he wants to study abroad; on the other hand he worries that the tuition is too expensive.
一方面 我 想 在 公园 散步， 一方面 我 需要 在 家 认真 复习 中文。yìfāngmiàn wǒ xiǎng zài gōngyuán sànbù, yìfāngmiàn wǒ xūyào zài jiā rènzhēn fùxí zhōngwén.
On one hand I want to take a walk in the park; on the other hand I need to stay home and seriously review Chinese.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.