Personally, I think it is reliable.
After all, it is a formal calligraphy and painting academy. If you teach online, then its teachers are also very high-level. As long as you are willing to study hard and practice hard, then the Chinese painting you learn online should be able to reach the level. It’s at a certain level, so it’s worth it, it should be learnable, and it’s very reliable.
The term Chinese painting originated in the Han Dynasty, and mainly refers to scroll paintings painted on silk, rice paper, and silk and framed. Traditional Chinese painting is a traditional Chinese painting form that uses a brush dipped in water, ink and color to paint on silk or paper. Tools and materials include brushes, ink, Chinese painting pigments, rice paper, silk, etc. The themes can be divided into figures, landscapes, flowers and birds, etc., and the techniques can be divided into figurative and freehand brushwork. The content and artistic creation of Chinese paintings reflect the ancients' understanding of nature, society and the politics, philosophy, religion, morality, literature and art associated with them.