The piano score of the birthday song is as follows:

The birthday song, written by Pan Zhensheng and Xu Huaying, is a popular song to celebrate birthdays. This song has been translated into many languages ??and is often sung in countries where English is not the main language. :

The melody of "Happy Birthday to You" was written by American Ms. Mildred Hill in 1893 when she was teaching kindergarten in Louisville, Kentucky, USA. The melody was used in a song called "Good Morning to ALL," written by Ms. Mildred Hill's sister, Patty Hill, and used as a classroom greeting.

Reference material: Baidu Music? Birthday Song