In one’s life, changing jobs that many times – isn’t that unfair to oneself?

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My career in the chemical industry: My name is Zhao Jialin, and my WeChat ID is 15005197669. I have been involved in the technical research and development or project construction of various chemical-related projects; I welcome any exchanges. 1. In 2021, Nantong Haiqing Pharmaceutical Technology Co., Ltd. (Nantong City, Jiangsu Province) carried out research and development on continuous nitration technology using mixed acids, as well as on the application of vortex continuous flow microreactor technology. 2. A domestic company specializing in the research and development of cyclohexylamine technologies, as well as in the research and development of M-process technologies for rubber accelerators. Revived two set of three-effect evaporation units that were on the verge of becoming unusable. 3. Tianjin Duofuyuan Industrial Co., Ltd. (Jinghai District, Tianjin): Research and development of continuous nitration technology for naphthalene, **research and development of continuous gas-phase hydrogenation technology. 4. Caike Chemical/Victory Oilfield Dongao Chemical Co., Ltd. (Hekou District, Dongying City, Shandong Province), main products: nitrotoluene, o-toluidine, γ-butyrolactone, N-methylpyrrolidone. 5. Dongao Chemical Co., Ltd. of Shengli Oilfield (Dongying City, Shandong Province): main products include nitrotoluene, o-toluidine, γ-butyrolactone, and N-methylpyrrolidone. 6. Zhucheng Taisheng Chemical Co., Ltd. (Zhucheng City, Shandong Province) – technology transfer for cyclohexylamine. 7. Zhanhua Jiashi Chemical Co., Ltd. (Binzhou City, Shandong Province), main products: cyclohexylamine, aniline, o-toluidine. 8. Shandong Huahong Chemical Co., Ltd. (Tai’an City, Shandong Province), main products: ***, aniline, o-toluidine, cyclohexylamine. 9. **Duzijin Chenghua Chemical (Nanjing) Co., Ltd. – Main products: ***, aniline, cyclohexylamine, saccharin. 10. **Sanyuan Enterprise (Nanjing) Co., Ltd., a wholly-owned company; main products: cyclohexylamine, saccharin. 11. Nanjing Jintian Chemical Co., Ltd., a Sino-foreign joint venture, whose main product is cyclohexylamine. 12. In 1989, the Sino-foreign joint venture Nanjing Sili Chemical Co., Ltd. was established; its main products were *** and aniline.