A new breed of e-cigarette has addicted teenagers and confounded regulators worldwide by offering flavors like Blue Cotton Candy and Pink Lemonade in a cheap, disposable package. The tycoon dominating this latest wave is Zhang Shengwei, 50, a veteran of China’s vape industry in the southern manufacturing hub of Shenzhen. Most people have never heard of him. Zhang quietly rose over 15 years from a boutique exporter to become one of the world’s largest vape manufacturers. His main company, Heaven Gifts, now competes with industry giants Juul Labs Inc and British American Tobacco Plc (BATS.L) in the United States, the United Kingdom and across Europe.