冒昧 (mào mèi): ตัวหนา

May I ask boldly—is your surname Li? I think I've seen you somewhere before.

I am writing to you presumptuously because I would like to ask a question about Chinese history.

Sorry to bother you, but could you tell me how to get to the nearest subway station?

I boldly invite you to my birthday party and hope you can come.

I hope you won't take offense at my presumptuous request.