China’s two biggest makers of lidar sensors for cars, Hesai Group and RoboSense Technology, have ramped up investments in robotics products as the country consolidates its leading position in building a global supply chain for the fast-growing sector.Shanghai-based Hesai, the world’s largest producer of lidar sensors that help cars map terrain, planned to spend 200 million yuan (US$28.9 million) this year to design and manufacture “eyes and muscles” for robots, creating a new growth engine...