The enemy's attack on Tianjin caused the death of all the people, saying that chlorine cannons were used here. A test of chlorine can detoxify doctors, but its nature is very toxic, and the nose can be killed instantly.
The report directly pointed out that the gas bomb was a "chlorine gun". Chlorine is indeed a highly toxic chemical gas, which can quickly kill people through the respiratory tract. At that time, few people could know chlorine and had a chemical concept. It can basically be concluded that Eight-Nation Alliance used chemical weapons similar to gas bombs in its war of aggression against China.