Dear XXX:
I am the senior school student who lives in your opposite apartment.I am really sorry to say it but your daughter's playing piano every night does disturb me a lot.As a result,I would like to ask you whether you can let your daughter change the time to practice piano.
The homework is very heavy in our school and I need more than six hours to do it every day.However,the noise caused by the piano rushed into my ear every time that I cannot concentrate my attention on the homework.I think it would be much better for me if your daughter can play piano three hours earlier,and that,at the same time,won't influence your daughter herself,which is win-win.
Many thanks!And best wishes!
Kind Regards,
YYY