1, Style Features: Each artist has his own unique painting style and skills. Blue Ci can observe the style characteristics of painting, such as the use of lines, the collocation of colors and the way of composition. To judge the creator of this painting.

2. Signature or marking: Many artists will sign or mark their names or representative symbols, such as abbreviations and patterns, on their paintings. Lanci can look for the signature or mark on the painting to identify the author of the painting.

3. Background check: When Lanci is very interested in a painting, he can do some background checks. Knowing the source of the painting, the past owner, the artist's creative history and other information will help Lanci determine the identity of the painting.