According to the national standard information public service platform, the status of the national standard of electronic cigarettes (20171624-Q-456) has been changed to "soliciting opinions". The draft for soliciting opinions proposes that the concentration of nicotine in atomization should not be higher than that of 20mg/g, and the total amount of nicotine should not be higher than that of 200mg. Nicotine release should not be higher than that of 0.2mg/puff. Among the atomized impurities and pollutants, 2-diketone should be ≤ 22mg/kg, and arsenic (calculated by As) should be ≤ 3mg/kg.