But incredibly, his parents and relatives have joked about Cheng Cheng's taste for alcohol. It started when he was a baby and his father gave him a drop of wine to stop him crying, reports claim.

Not yet in school, the little boy can now allegedly drink up a whole bottle of beer without any noticeable effects.

His aunt Cai Teng said: 'At that time, all of us in the family have already thought that this child can really drink a lot when he grows up.'

Whenever his family takes out bottles of alcohol, he demands to drink some, she explained.

His mother, fearing that she and her husband could face legal consequences over their questionable parenting, has reportedly tried to get him to swap booze for milk, juice or other drinks.

But she said: 'His eyes are always on the alcohol bottles. We can only try their best to store the bottles in a place which in not seen by him.'

Cai said that during big festivals Cheng Cheng would cry for alcohol when he saw relatives and friends drinking.

She said: 'As sometimes he is really noisy, we have no options but let him to try a little bit of wine.'

A few days ago, Cheng Cheng's father shared a bottle of beer with Cheng Cheng who downed it in minutes. Cai said that Cheng Cheng's ability to handle alcohol has made the family both surprised and worried.

'We will not let him drink or touch alcohol anymore as we afraid that it will affect his growth,' she added.

Pediatricians in mainland China said that the body and organs in children at this age are not well-developed. A little bit of alcohol can easily harm their health.