This brand is an old one. I have been selling their products for five or six years. The products are pretty good and the service is pretty good. Jingen has never been sold, but the feedback from Zuoguoling has been particularly good. I usually visit more often and teach farmers how to use products correctly and precautions. Any product will cause problems if used carelessly. I am still selling their products this year, and the salesperson has been with me for several days, and there is also a salesperson, which is pretty good.