During the severe epidemic, cleaning staffs of our company could not come to work. But the severer the epidemic, the more important to clean and disinfect, especially the designated hospitals for COVID-19 patients. Just when I was bruised and battered, I met BP intelligent and I bought a smart disinfection floor scrubber robot from them, it turned out to be a good investment later on. One robot almost can handle workload of 5 people. Afterwards, my cleaning staffs came back, their work became much easier, so we can pick up more tasks which leaded to exploded revenue. The ROI raised a lot compared with fully manual way after careful review.