Teacher Zhou Zhihui is recognized as a master of Chinese painting in domestic painting circles at present, so he is a national first-class painter and a special allowance expert of the State Council. He is known as the first person in painting and calligraphy circles, and his works are certainly worth collecting. It's hard to say about the collection value of Zhou Zhihui's paintings and calligraphy. If you like his work, you may not change thousands of dollars, but no matter how much you don't like it, it's not worth it. From an objective point of view, just check his auction records online. However, as a collection, auction records can only be used as a reference, not as a value appraisal. In recent years, the calligraphy and painting market is on the rise. Similarly, there are many fakes. The job you are talking about is impossible. First, the original painting was exhibited in the Great Hall of the People. Secondly, if the works are made by Zhou Zhihui, it is impossible to have thousands of dollars, because the auction record of Zhou Zhihui's works broke 50,000/square foot in earlier years. Therefore, it is recommended to contact the author for confirmation.
Suggestion: In order to collect famous calligraphy and painting, it is best to trade directly with the painter. At present, domestic painters generally have their own studios or galleries, which can be searched online and seen on the spot.