is this sentence correct?

Huayi electronicCan anybody understand the above sentence?

Yes.

Huayi electronic Is it correct?

No.

Does your company need to buy earphones now?

Is there a phrase "in demand of"?
And I don't want to use "buy" in my email, how can I write?
Can I write like this: Does your company need to purchase earphones now?

Huayi electronicAnd I don't want to use "buy" in my email

Why not? It is clear, short and direct: perfect for English advertising. Your problem is that your phrasing is long, clunky and non-native.

my question is about the sentence, so, the sentence is correct but clunky and non-native, right??

I need to check whether the sentence correct or not. And then correct other problems.

I'd better don't use "buy" in my follow-up email.

Huayi electronicIs there a phrase "in demand of"?

Yes, but it's used in the abstract areas of the study of economics, not in the context you have presented here.

Example: Change in demand refers to [increase or decrease in demand] of a product due to various determinants of demand

Hello Calif, thanks for your help.

Does your company need to purchase earphones now?
-can I write like this?

Huayi electronicDoes your company need to purchase earphones now? - Can I write it like this?

It's completely grammatical. Yes.

CJ

Thank you so much Calif!!