What is the music of China Ping An advertisement during CCTV weather forecast?

The writer is johann pachelbel (1653 ~ 1706), a German, who used to be Bach's teacher. However, some people say that it was an unknown composer at that time. In order to sell this song, he passed off the works of the famous Pacabel at that time. A polyphonic music form composed entirely of imitation. When every voice that has entered successively plays (sings) a melody at the same or different pitch from beginning to end, it is called cannon. The first part of it is called the opening sentence or the main sentence, and the latter part is called the response sentence or the answer sentence. Canon and Giger in D major (johann pachelbel), also known as Canon in Pacser Bell.