● On June 8th, 2000, 1 1, Beijing Lier Refractory Co., Ltd. was founded for Zhao Jizeng and other 2 1 natural persons and Beijing Tiantu Xingye Venture Capital Co., Ltd.
● On February 28th, 2007, 65438, Lear Co., Ltd. established Beijing Lear High Temperature Material Co., Ltd. through overall change.