The man was pronounced dead on arrival at the Naivasha District Hospital, while another tourist survived the attack on Saturday evening, according to the Kenya Wildlife Service.
His 62-year-old friend, Wu Peng Te survived the tragic encounter and is recuperating at Lake Naivasha Lake Naivasha Sopa Resort.
In the natural reserve near lake Naivasha (90 km from the capital of Kenya, Nairobi) the Hippo killed the tourist.
Witness James Omollo said the man got too close to the animal which turned against him, biting him on the chest.
His colleague, also from China, was also injured in the incident and is being treated at a local hospital.
The Kenya Wildlife Service said it was tracking the hippo concerned.More news: Trump tightrope walk before rally
The hippo that attacked the tourist was "looking for pasture near the hotel. This is not the first time", he remarked.
It is reported that every year in Africa from attacks by hippos killed about 500 people. "His injuries were serious and he died minutes after he was retrieved from the lake", Rift Valley criminal investigations chief Gideon Kibunja told The Associated Press.
Kilo, who is also an honorary warden, said that closure of wildlife corridors and encroachment of riparian land has contributed to the rising attacks.
Several people have questioned the rationale of killing the hippo, which they say was provoked in "its natural habitat".
Kenya earned $1.2 billion from tourism in 2017, with 1.4 million tourists arriving in the country, according to the BBC.