Is the Spring Festival Evening lip-synching or live recording?

Sometimes it's recorded, sometimes it's actually sung.

There are some mistakes in the so-called lip-synching In fact, singers are considered lip-synching just because they don't really sing live, which is wrong. Because the recorded voice is also the singer's voice.

The director of the Spring Festival Evening thinks that in order to ensure that the singer does not make mistakes, he should not really sing live. It was recorded this year, and it seemed to be a real singing in previous years.