How to appreciate flower-and-bird painting, landscape painting and figure painting in Chinese painting?

Appreciating a work of art without a fixed "aesthetic standard" is like looking at a person, a beloved person. Can you tell me the specific reason why you love him or her? If you are not engaged in academic research, there is no need to be such a pedant! The best way to appreciate is to put painters and works in the long river of art history to read. This is my way of painting, which may not be suitable for everyone, because everyone's aesthetic way and experience are different. In fact, a painting and a work of art can be viewed from different angles. A Mona Lisa by Leonardo da Vinci has been painted hundreds by later generations, which is not the best interpretation!