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| Mon 18 May 2026
Beijing, May 18 -- Shanghai Qianfeng New Energy Resources Science & Technique has submitted a patent application for Intelligent Dimming Device for Variable Lane Signboard. This invention was developed by Li Chaohui, Wang Zhonghua, Zhou Yonggang, Zhu Jian, Gu Weihao, Ma Yunpeng, Li Xinming, Li Xinliang, Zhou Yan, Wu Shichao, Li ..