Nestled in the heart of Asia's technological hub, Shenzhen has become a global magnet for the e-cigarette industry. Factories sprout across the city, churning out millions of devices each year. From sleek devices to https://lucycdiz423530.frewwebs.com/37593918/shenzhen-s-vaping-hub-a-look-inside-china-s-e-cigarette-factories