Wu Chunmiao, a blind Chinese runner, was thrilled to win a Paralympic gold medal, but regretted that her guide runner, who helped her to win, couldn't get one as well.

It is common for athletes to credit families, coaches or friends for their success, but the Paralympians who are visually impaired may have more people to acknowledge -- their guides.

On the podium, Wu placed her gold medal, earned from women's 100m T11 on Tuesday, around the neck of her partner Li Jiayu.

Paralympic rules allow runners and cyclists with visual impairment to be helped by guides in their competition. In running, the athletes and their guides are tied together with strings around their wrists or fingers. In track cycling, the guide rides on the front of the bike while the athlete pedals at the rear.

The athletes work hard to push for their limits, and guides aid them alongside. But rules have been put in place to keep such aid in check to ensure equality. For example, a guide runner can not cross the finishing line ahead of the runner and a guide cyclist can't be chosen from the top-calibre athletes who are believed to be over-enabling.

Before the men's 100m final, Chen Liang, a guide, told his partner Liu Xiangkun where to put his hands at the starting line, and helped Liu to face the right direction. He also kept murmuring to Liu: "Relax, relax."

A string was tied to their hands as the two sprinted down the track in tandem. When the scoreboard flashed a near-personal best for Liu at the fifth place, Chen reported the scores to Liu as both were gasping.

"I work as his eyes. I follow his rhythm. And my job is to make sure he doesn't cross the lanes or foul in any way," said the guide. Chen is not discouraged by his supporting role, but prides himself in representing his country together with a Paralympian, and helping him to perform to his best.

It is true that sports are about individual feats, but the Paralympic Games have aptly proved that they are also about the cooperative spirit. The outpouring of brotherly love brought about by the bond between the guides and the athletes has become one of the most touching scenes at the Beijing Games.

"He is not my brother by blood, but I should say that he is more close than a brother," said Liu Xiangkun of his guide.

The two started training together just about nine months ago. Before having Chen as his guide, Liu had to train by following the hand-clapping sounds of his coach. A competent guide helped him to break the national record earlier this year and move closer to the world record.