Guests take the lead in playing the "rainbow rush" water racer slide at the Water World Ocean Park, Hong Kong Island, Hong Kong Special Administrative Region (HKSAR) on August 9, 2021. The 17 meters high eight-lane racer slide will officially open to the public on September 21. (Photo: China News Service/ Li Zhihua)

A child plays the "rainbow rush" water racer slide at the Ocean Park, Hong Kong Island, Hong Kong Special Administrative Region (HKSAR) on August 9, 2021. (Photo: China News Service/ Li Zhihua)

Models pose for photo in front of the "rainbow rush" water racer slide facilities at the Ocean Park, Hong Kong Island, HKSAR on August 9, 2021. (Photo: China News Service/ Li Zhihua)

Timers that hang over the shelves allow visitors to race the speeds while enjoying the racer slides at the Ocean Park, Hong Kong Island, HKSAR on August 9, 2021. (Photo: China News Service/ Li Zhihua)