Hung taught himself what he needed to know. His machine is built from a motor, a set of cutting blades, a unit that collects and shreds the grass, a control handle and a lifting mechanism on wheels. It does all three jobs in one pass: it cuts the grass, gathers it and shreds it into fodder. It is designed for soft-stemmed fodder grass, the crop that feeds the herds around him.
Farmers in the area had been using hand-held cutters. According to the Vietnamese newspaper Dan Viet, Hung's machine works about ten times faster. It handles three tonnes of grass an hour and reduces manual work by 50 to 70 percent. With the machine, one person can look after about 100 cattle.
Hau Nghia has plenty of cattle. The commune has more than 15,000 of them, spread across more than 2,300 households, and most of those households start the day with the same job Hung did. Other farmers wanted the machine too. Hung has sold about 50 units, both in Tay Ninh and in other provinces.
In August, the invention won a third prize in Tay Ninh's first Farmer Technical Innovation Contest. The provincial Farmers' Association ran the contest with the Department of Science and Technology. It received 79 entries from 67 of the province's 96 communes and wards. The judges chose 20 finalists and gave out 12 prizes.
The first prize went to Nguyen Tan Sang of Hoa Khanh Commune. His machine sifts grass seed out of rice 20 to 30 times faster than sifting by hand. The second prize went to Vo Thanh Liem for an improved system for incubating the eggs of red-tailed catfish. Each winning entry started with a farmer's own daily work.
Hung's commune has only recently become part of Tay Ninh. Hau Nghia used to belong to Duc Hoa District in Long An Province. When the two provinces merged in 2025, it became a commune of Tay Ninh. None of that changed the daily work. The cattle still need feeding every morning, but in Hung's commune, one person with his machine can now do that job for a whole herd.