Lake Naivasha is one of the major habitats for hippos in Kenya.

"Hippos normally remain underneath the water in daytime and come to the bank for food at night," said Liu Shihong, a Chinese guide working at a Kenyan travel agency.

"Despite hippos' tame look, they are actually one of the most aggressive animals in Africa, claiming the most human lives every year."

Liu said he usually warns his guests not to approach the banks of Lake Naivasha after dinnertime.

Shi Qiong, a Shanghai native who visited Kenya and Tanzania in September, said many Chinese are attracted by African safaris, but many of them are not prepared for such adventures as "they are used to traveling with tourist groups that do the homework for them".

"They don't have enough self-protection awareness — hippos in a wild environment are different from those they see in the zoo — they're more aggressive," said Shi.

She added that her African tour guide advised her to stand at least 20 to 50 meters away from hippos while observing them.

Meanwhile, Han said her hotel in Kenya failed to give proper warnings to Chinese tourists.

"With the increasing number of Chinese tourists, many warning signs are still in English, French or other languages, not Chinese," he said.

Jiang Yiyi, a researcher with the China Tourism Academy's International Tourism Development Institute, said nowadays tourist safety concerns not only come from animal attacks but also from road safety issues, political turmoil and robbery. She advised tourists to buy insurance before heading abroad.

"Carry travelers' checks or use credit cards instead of cash if possible," Jiang said. She also called for Chinese tourists to regularly check official websites of the National Tourism Administration and Ministry of Foreign Affairs before visiting a foreign country to avoid dangerous areas.

Han added: "In the past, there were cases of traffic accidents or violation of regulations in the wild in Kenya that claimed the lives of Chinese tourists. Almost all the accidents were associated with illegal travel agencies or unprofessional tour guides."

Han said many Chinese tourist agencies organized their teams in China and then transferred them to less-qualified local companies to run tours. He said legally registered and professional tour agencies in Kenya will provide training on security protection for tourists.