Meanwhile, other co-host cities for the Games are also almost ready for the competitions. Among them is Hong Kong.

Hong Kong will host the Olympic equestrian events at Sha Tin District. It has spent 1 billion yuan, or nearly 150 million U.S. dollars, over the past two years to turn a dilapidated stadium in the district into a top-class equestrian venue.

Lam Woon-kwong, CEO of the Hong Kong Olympic Equestrian Company, says the top priority now is to take care of the horses after they arrive.

"The first batch of equestrian horses will arrive in Hong Kong on July 26. They will be accommodated in Sha Tin's stables right away, with a set temperature of 23 degrees centigrade."

Lam says special cooling tents and mobile air conditioning systems also have been set up at the venue to cool down horses after workouts and races.