The public has been recently reminded again that they are not allowed to take long umbrellas as well as soft drinks, lighters and liquids into the Olympic stadiums during the Games.
An official of the Beijing Municipal Bureau of Public Security said some people might not pay attention to those daily items which listed on tickets along with other illegal items, such as explosives.
According to the Beijing Organizing Committee for the 2008 Olympic Games (BOCOG), security staff won't keep the banned daily items for the audience during the Games as they did in the "Good Luck Beijing" test events.
As long as there is a security risk, security personnel get to remove it.
After series of national-level anti-terrorist drills held in Beijing and other co-host cities including Shanghai, Tianjin, Qinhuangdao, Shenyang and Qingdao, the security work has also been extended to more detailed aspects.
Like the long umbrellas, people's handbags became new target for security checks.
Beijing subway passengers were subjected to new security checks on June 29 at the start of a three-month campaign to ensure a safe Olympic Games and Paralympics.
More than 3,000 inspectors at 93 metro stations began searches for dangerous articles, including guns, ammunition, knives, explosives, flammable and radioactive materials, and toxic chemicals.
Large items of luggage would be checked by X-ray machines, while smaller bags would be randomly checked. More than 30 dogs were also to be used for random inspections, and another 30 were being trained, according to Jia Peng, a spokesman of the Beijing subway system.
Liquids would also be checked, unless the passenger takes a drink in front of inspectors.
Beijing has five subway lines in operation with 140 kilometers of track, transporting millions of passengers every day.
More than 90 dangerous items were stopped from getting into the capital's subways and more than 50 passengers were turned away on the first day of compulsory security checks.
The government has enacted a slew of measures this year to ensure aviation safety ahead of the Olympics, banning lighters and matches from carry-on luggage and telling passengers to remove their shoes for security checks.
From May 1, the Civil Aviation Administration stepped up pre-flight data reporting for passengers and crews on international flights and limited the number of cabin baggage articles.