Valuable. Zhang Lei's paintings are very precious. Zhang Lei has held a personal painting and calligraphy exhibition in the Louvre, the world's largest art treasure house, the first of the four major museums, and the world-famous palace of treasures. Zhang Lei's original "Cosmic Body Zhangcao" won the "Intangible Heritage" certificate, so Zhang Lei's paintings are very valuable. Mr. Shen Peng, chairman of Zhang Lei’s Chinese Calligraphers Association, called him “a giant in the painting world and a unique figure in the world.”