Liushen florida water. [Photo from web]

But the balm is not the only 'hot' summer item. The best seller is Chinese brand Liushen florida water.

It has a long history of dominating the domestic market as mosquito repellent and eliminating prickly heat.

In case you are wondering how can water repel mosquitoes or eliminate prickly heat, trust us it's not a joke.

Many internet users shared their experience on Sina Weibo of using the Liushen water, which contains menthol and ethanol, to cool off in summer.

A user said: "I poured half a bottle into my bath. Then I started shivering as it had turned the water so cold. And the shivering didn't stop even when I went outside in 40 degree Celsius."

Another said: "I applied it on my body when I was using shower gel. It worked so well that I had to wrap myself in a blanket to keep warm while it was 40 degrees outside."

However, foreigners have a completely different take.

On an online perfume forum in Iowa, most online users thought it was cologne or even aftershave.

Someone was shocked when they discovered that the water was actually advertised as a mosquito repellent, a pitch that made the product more mysterious.