The man's name is Tu, He comes from Thanh Hoa, Vietnam. He is also known by the other name who built the house for birds nest.
On one occasion, he discovered birds nest around the house, he used sounds to attract them. Unexpectedly, the birds nest flew to his house to nest.
He used the second floor of the house as a nest for a bird's nest.
Thousands of swift nests have nestled in his house.
At the end of the season, after the bird's nest is finished taking care of the young bird, the man proceeds to harvest the bird's nest.
Bird's nest, also known as "Edible bird's nest".Edible bird's nests are bird nests created by edible-nest swiftlets, and other swiftlets using solidified saliva, which are harvested for human consumption. They are particularly prized in Chinese culture due to their rarity, high nutritional value in nutrients such as protein, and rich flavor. Edible bird's nests are among the most expensive animal products consumed by humans, with nests being sold at prices up to about $3,000 per pound ($6,600/kg), depending on grading. The type or grading of a bird's nest depends on the type of bird as well as the shape and color of the bird's nest. It is usually white in color, but there also exists a red version that is sometimes called "blood" nest. The Chinese believe that it promotes good health, especially for the skin. The nests have been used in Chinese cooking for over 400 years, most often as bird's nest soup.
Each season a man can harvest a few kilograms worth about 60,000 USD.
Video captured in Thanh Hoa, Viet Nam.