Longtan is the most important tea-growing area in Taoyuan County, also the first place in Taiwan to grow the flowering Lupinus plants. It is home to Lupine flowers. At the end of each year, Lupine seeds are sown between tea plants by the local tea farmers’ association. Lupine flowers will be in full bloom between the following February and March, with their golden petals looking gorgeous in the bright sunlight. They are quite a feast for the eyes. These flowers, after withering away, will become good nutrients for the tea plantations. They sacrifice themselves for other plants, a characteristic that makes them look like a mother to the Hakka people. That’s why the Lupine flower is considered to be the Hakka people’s mother flower.