Chinese phrase
您什么时候方便回电？ nín shén me shí hòu fāng biàn huí diàn
Meaning
When would be a convenient time for you to call back?
When to use it
Asks when a return call would be convenient. It is polite and suits business or formal conversations, while leaving the timing to the other person.
Example dialogue
刚才给您留了短信，您什么时候方便回电？ gāng cái gěi nín liú le duǎn xìn nín shén me shí hòu fāng biàn huí diàn
I left you a message earlier. When would be a convenient time for you to call back?
明天上午十点比较好，我会准时接电话。 míng tiān shàng wǔ shí diǎn bǐ jiào hǎo wǒ huì zhǔn shí jiē diàn huà
Tomorrow at 10 a.m. would be good. I will answer the phone on time.