New Year's Eve on the boil gradually formed the habit of years, Shou Sui.

Shou Sui, that is, the last day of the old do not sleep at night, stay up all night to greet the new year's arrival of the customs, also known as New Year's Eve Shou Sui, the common name "boil years."

If the innards of each pig are Petri dishes, then possible pandemic flu viruses have been stewing on hog farms for decades.