Foyer introduction: The four large mineral crystals at the entrance and foyer of the museum are common mineral components of calcite and gypsum, which are used to make cement raw materials. Under the influence of geology, they grow into rare large petal-shaped crystals, showing the magical charm of nature. The cultural wall in the foyer is inlaid with geological and mineral specimens taken from all over the province, representing Henan's geology, paleontology and minerals. The two connected pieces contain the geological meaning of the junction of the two major plates in Henan, as well as the pinyin of Henan. Abbreviation.