This painting is to be sold with a certificate of authenticity signed by the artist's wife, Ching-Chao Chu.

The famous French critic, Jean-François Chabrun, deemed Chu Teh-chun as "Peintre Song du XXe siècle, (Twentieth Century Song Dynasty Painter)". This title suggests lots of meanings. Chu Teh-chun himself has showed special respect for Song Dynasty art. He has always thought that the landscapes painted by artists, such as Fan Kuan, Li Tang, and others, are full of abstract features. The essence of art in the Song Dynasty lay in the natural painting skills, which reached a height of unity with nature. In addition, the techniques were not limited to nature so that they got a perfect internal and external blending. Chu successfully mingles Chinese traditional landscape painting with modern painting under his profound comprehension of the masters' spirits in the Song Dynasty. His style is noble and unique, which receives admiration from the French artistic sector.

After researching various styles and calligraphy performances in the 1950s and 1960s, Chu Teh-chun broadened his painting field in the 1970s. Nature in his paintings has magically become mental imagery. The subtle changes of light and shade cause the whole picture to be filled with a moist rhythm, just like a wash painting, showing a poetic nature.

This painting "Sans titre" was composed by Chu Teh-chun in the 1970s. The artist chose his favorite blue color as his main tint. It is friendly and poetic because blue is the original color of the sea, which bred the lives on earth. The artist mainly used bold stokes in order to show the effect of a beautiful texture. The rich and delicate painting conveys a mysterious and abstruse Eastern emotion, just like a piece of melody with musical notes rising and falling on the ear, partly hidden and partly visible.