Please accept my hearty congratulations.

请接受我最衷心的祝贺。


Please accept my …  请接受我…  例：Please accept my warmest congratulations.请接受我最热烈的祝贺。Please accept my warmest/heartiest congratulations on your being elected President.欣闻您当选为总裁，请接受我最热烈/衷心的祝贺。