Photo taken on Sept. 28, 2010 shows a worker trains white whales in Haichang Polar Ocean Park in north China's Tianjin Municipality. The Polar Ocean Park in Tianjin will open to the public soon, visitors can see more than 30,000 kinds of marine creatures such as white whale, polar bear and penguin in the park. (Xinhua/Wang Guangrong)

Photo taken on Sept. 28, 2010 shows workers inspect the fish in Haichang Polar Ocean Park in north China's Tianjin Municipality. The Polar Ocean Park in Tianjin will open to the public soon, visitors can see more than 30,000 kinds of marine creatures such as white whale, polar bear and penguin in the park. (Xinhua/Wang Guangrong)