Supplement Agreement by and among, TMSR Holding Company Limited, Shengrong Environmental Protection Technology (Wuhan) Co., Ltd., Hubei Shengrong Environmental Protection Energy-Saving Science and Technology Co. Ltd., Long Liao, Chunyong Zheng, Wuhan Modern Industrial Technology Research Institute, Hubei Zhonggong Materials Group Co., Ltd., and Wuhan Host Coating Materials Co., Ltd., dated August 16, 2018