Are the paintings and calligraphy works of the painter Mr. Xu Rongshuang worth collecting?

It is worth mentioning that Xu Rongshuang, a famous contemporary painter in China, is a disciple of Mr. Zhang Hai, chairman of China Calligraphers Association. He is good at painting landscapes and peonies, especially landscape paintings. His works won high prices at many large auctions. One of his works of art, a landscape painting, is 6 feet and 380,000 yuan; A calligraphy work, 6 feet 290 thousand. Worth collecting.