Liquid metal imbalance of the surface tension induces a pressure difference between the rear and the head, which produces a thrust to drive the droplet toward the head; at the same time, the hydrogen produced in the electrochemical reaction process also further raises the thrust. The discovery of this phenomenon laid the technical foundation for the development of intelligent motors, vascular robots, fluid pumping systems, flexible actuators and even more complex liquid metal robots. Liquid metal Liquid metal consists of alloys with very low melting points which form a eutectic that is liquid at room temperature. The standard metal used to be
The Painted Skin Painted Skin", describing Wang as relying on his wife to restore "the Deep Structure of male-dominated Chinese culture." Due to its widespread popularity and usage, the term "huapi" () became a Chinese idiom. According to Mair and Mair, "the words “painted skin” have become a synonym for duplicity that wears an outwardly human face but is inwardly demonic." During the rise of Communist China, led by Chairman Mao Zedong, the meaning of "huapi" took on a political undertone; at different points in time it was used to describe United States colonisation, USSR revisionists, as well as the Gang of Four,