Network technical services; Sales of electronic products; Sales of office equipment; Intelligent robot sales; Sales of electronic office equipment; Electronic components wholesale; Retail sales of electronic components; Sales of electronic components and electromechanical components; Battery sales; Sales of calculator equipment; Intelligent instrument sales; Sales of pharmaceutical special equipment; Sales of new energy prime mover equipment; Sales of intelligent in-vehicle equipment; Smart home consumer device sales; Intelligent unmanned aerial vehicle sales; Lighting appliances sales; Sales of wearable smart devices; Sales of household appliances; Sales of rubber products; Sales of plastic products; Sale of arts and crafts and ceremonial supplies (except ivory and its products); Sales of labor protection products; Sales of hygiene and disposable medical supplies; Sales of Class I medical devices; Wholesale of protective equipment for medical personnel; Retail sale of protective equipment for healthcare workers;