What is the alcohol concentration in the blood to be drunk driving?

Legal subjectivity:

1. Drinking and driving: The alcohol content in the blood of the driver of the vehicle is more than or equal to 20mg/ 100mL and less than 80mg/ 100mL. 2. drunk driving: the alcohol content in the blood of the driver of the vehicle is greater than or equal to 80mg/ 100mL. 3, drunk driving a motor vehicle, motor vehicle driver's license for six months, and impose a fine of more than one thousand yuan to two thousand yuan.

Legal objectivity:

Article 91 of the Road Traffic Safety Law, whoever drives a motor vehicle after drinking alcohol shall be detained for six months and fined between 1,000 yuan and 2,000 yuan. Whoever is punished for driving a motor vehicle after drinking or driving a motor vehicle after drinking again shall be detained for not more than 10 days, fined not less than 1,000 yuan but not more than 2,000 yuan, and his motor vehicle driver's license shall be revoked. Drunk driving a motor vehicle shall be restrained by the traffic administrative department of the public security organ until it wakes up, and the motor vehicle driving license shall be revoked, and criminal responsibility shall be investigated according to law; No motor vehicle driver's license shall be obtained again within five years. Anyone who drives a motor vehicle after drinking alcohol shall be detained for 15 days, fined 5,000 yuan, and his motor vehicle driver's license revoked. No motor vehicle driver's license shall be obtained again within five years. Anyone who drives or operates a motor vehicle in a drunken state shall be restrained by the traffic administrative department of the public security organ until he wakes up, his motor vehicle driving license shall be revoked, and criminal responsibility shall be investigated according to law; No motor vehicle driver's license shall be obtained again within ten years, and no motor vehicle shall be driven or operated after obtaining the motor vehicle driver's license again. If a serious traffic accident occurs after drinking or drunk driving a motor vehicle, which constitutes a crime, criminal responsibility shall be investigated according to law, and the traffic administrative department of the public security organ shall revoke the motor vehicle driving license and shall not re-obtain the motor vehicle driving license for life.