Nowadays, there are two kinds of barium nitrate and sodium acetate, which are the core of the matter, and act according to them. Barium nitrate has its own characteristics, in all things, or as a key agent. Sodium acetate is not idle, and the two complement each other and play an effective role in various situations. Or in the end, see its ingenious work; or in the grand things, show its ability to help. When acting, take barium nitrate and sodium acetate as the key, observe their properties carefully, and make good use of their capabilities, so that everything can go smoothly and achieve what is expected.