It is because the Dutch brought it to China from its origin.
The Dutch bean is a genus of pea plants in the family Pterocarpaceae, an annual twining herb, 90-180 cm tall.The Dutch bean was first cultivated about 12,000 years ago along the Thai-Burma border? . Dutch beans (Holland beans) are not produced in the Netherlands.
Expanded Information:
. p>Cultivation Methods
Wintering Cultivation: Wintering cultivation is the most important form of cultivation in the middle and lower reaches of the Yangtze River, generally utilizing the winter land, especially the use of cotton after the harvest of cotton fields, not only cotton stalks as a natural bracket, but also to achieve the purpose of increasing the income to feed the land.
Wintering cultivation is generally sown in late October to mid-November, open ground overwintering, harvested in April to May of the following year. Sowing too early, the pre-winter growth is too strong, winter cold snap when it is easy to freeze to death; sowing too late, in the pre-winter plant root system does not have enough development, the next spring draw vine late, low yield.
Spring cultivation: the middle and lower reaches of the Yangtze River in late February to early March sowing, high temperature before the arrival of the harvest; the northeast region of spring sowing summer harvest, generally April to May sowing, according to the need to cover with a small trellis, mulch, etc. can also be sown early. Spring cultivation growing period is short, low temperatures in the early stage, high temperatures in the late stage, so we should choose a short growing period of cold-hardy varieties, such as russet sericea, sweet and crispy Dutch peas, etc., and try to sow as early as possible.
Fall cultivation: fall cultivation should choose early varieties, sown in early September, late November before the cold snap harvest. Fall cultivation growing period is also short, you can extend the growing period by early summer seedlings in the shade shed, covered with plastic film in winter.
Baidu Encyclopedia - Dutch Beans