Customers in large supermarkets of Beijing has to show their ID cards to buy knives from Saturday, Chinese Fachi wanbao newspaper reported.
The requirement to register all knives' buyers has been initiated by city's public security agencies. From now on a customer who wants to buy a knife or any other blade has to tell supermarket's special officer his or her name, ID card number, home address and purposes of knife use.
Supermarkets are prohibited to sell knives to teenagers and people with 'unusual and abnormal' behavior. If such categories of citizens want to buy knives, supermarket managers must call the police.
The requirement has been already in force in city's largest supermarket chains, while owners of small shops in the Chinese capital do not register the customers, the paper said.
The reason to tighten knives sale procedure is unknown. Previously ban on the sale of knives was introduced in Beijing during the celebrations of the 60th anniversary of the People's Republic of China in October 2009.