How to write a notice if the place does not give underage consumption?

Minors are not allowed to consume in this place, and the notice can read: minors are not welcome in this place, thank you for your cooperation.

Minors, according to the provisions of Articles 17 and 18 of the Civil Law of People's Republic of China (PRC), natural persons under the age of 18 are minors. Adults are people with full capacity for civil conduct and can independently carry out civil legal acts. /kloc-Minors over 0/6 years old whose main source of livelihood is their own labor income are regarded as persons with full capacity for civil conduct.

In other countries, the age range of minors is not exactly the same. China's laws against minors include the Law on the Protection of Minors and the Law on the Prevention of Juvenile Delinquency.