Cheng Xi is a small and medium-sized indoor floor cleaning robot focusing on residential buildings, office buildings, supermarket stores, hospitals and other small and medium-sized indoor floor cleaning robots. Its cleaning ability of sweeping and washing integrates, which solves the pain point of traditional cleaning methods that require multiple processes to complete the cleaning task, and can assist manual completion of conventional cleaning and deep nursing work with high labor intensity and high repeatability. As a cleaning robot, Cheng Xi has both intelligence and humanization. With the cooperation of the elevator controller, his small and flexible fuselage can take the elevator by itself to complete the cleaning work of different floors; it adopts self-developed aerospace-grade dToF navigation. It has the ability to build maps independently, and can choose the optimal cleaning path in the face of different working spaces to achieve high coverage and improve work efficiency; it can intelligently adjust the water output according to the different levels, effectively reduce water consumption; it can be synchronously self-cleaned during the cleaning process to avoid secondary pollution to the clean ground; it uses spectrum noise reduction during the cleaning process to filter out the high-frequency band that is more sensitive to the human ear to ensure the whole machine Run quietly and undisturbed; users can realize remote start and stop of robots, remote cleaning, mode adjustment, virtual wall planning and other controls through APP. In terms of interaction, Cheng Xi's universal facial expression and interactive lighting design enable users of different cultural backgrounds to easily recognize the different working conditions of the robot, enhance the goodwill of owners and customers to the environment, and increase the commercial value of the space environment. In terms of appearance design, the D-shaped body of Cheng rhinoceros is designed with side brushes, which makes it easier to clean the corners without dead corners and omissions. The transparent water tank cover is matched with a red filter screen to facilitate users to observe and clean. The top decoration adopts a spray-free process to ensure the environmental protection of the product manufacturing process. At the same time, the surface texture gives the fuselage a sense of strength and highlights the strong cleaning ability of Cheng.