BEIJING, Aug. 15 (Xinhua) -- The Badaling Great Wall was re-opened on Thursday to tourists after being closed for security gate installation.

    The famous tourist site, where the Olympics cycling road race events were held, was closed to tourists on Aug. 7.

    Security checks were erected on Thursday at the main entrance of the Badaling section of the wall, the ticket office of its cable car station and the entrance of a nearby zoo.

    Visitors were asked to walk through security gates and have their hand baggage checked by hand-held scanners or X-ray machines.

    Beverages and food were allowed without "test drinks," which security officials sometimes require to make sure any liquid is a beverage and not an explosive.

    Knives with blades longer than 5 centimeters were banned.

    The tighter security came after the Aug. 9 fatal stabbing involving Todd and Barbara Bachman of Lakeville, Minnesota, the parents-in-law of American coach Hugh McCutcheon.

    The Bachmans and their Chinese tour guide were stabbed in downtown Beijing by 47-year-old Tang Yongming from the eastern province of Zhejiang.

    Tang then killed himself by jumping from the second story of the 13th-century Drum Tower, a popular tourist site, where the attack took place.

    Todd Bachman died from his wounds, while his wife survived.

    The 6,700-kilometer Great Wall stretches from east to west across north China, through five provinces. Badaling boasts the best-preserved and most imposing section of the Wall, frequently portrayed in guide books and on postcards.