Huang Xian’s product is about the size of his fist, a sensor that detects electrical current leakage and slots into electric vehicle chargers as a safety guard between the car and the grid.
The device is not just a symbol of the innovation and accomplishments of China’s high-tech sector. It also reflects a trend eviscerating high-end manufacturing across the world, to the near despair of governments from Asia to Europe and beyond.
The EV boom has propelled Huang’s sensor shipments to a projected 10mn units this year, up from about 20,000 in 2019, when his company Mega-Senway Electronic Technology entered the market. Back then it was still a niche product, supplied by a handful of German and Swiss groups that sold the sensors for roughly Rmb200 (around $30) — or more per unit.