When Su Jinping moved to the Xixia district in Yinchuan, capital of Northwest China's Ningxia Hui autonomous region, 20 years ago, she saw a vast gray land full of sand and stones, hostile to human habitation and agriculture.

The 50-year-old woman, originally from neighboring Gansu province, has been working for 20 years at a winery in the district.

Su has harvested sweetness with thousands of other migrant women working in more than 110 wineries in Ningxia.

"We began building a vineyard when I first came here, but the grape seedlings were only two centimeters high and could die any time in bad soil," she says.

Now, Su earns about 3,000 yuan ($427) per month from the winery, as well as extra earnings from her field. With relentless ecological protection and restoration efforts by the local government, vineyards and wineries have mushroomed in the eastern foothills of Helan Mountain, which have become a green corridor over the past decade.

"Wine, in the color purple, is not only a dream of a better life but also better ecology," says Liang Yanshun, Party chief of the Ningxia Hui autonomous region.

Yuanshi Vineyard, where Wang Caixia works, is one of the wineries developed over the past decade in Ningxia. Built on the site of an old quarry, it employs some 200 workers, two-thirds of whom are migrant women around the age of 50.

"We cleaned up the old quarry ground and turned it into a vineyard with the help of the local government," says Yuan Yuan, the owner of the winery. "The stones we collected were used to build a winery in a typical Chinese architectural style."

Like Su, Wang is a migrant farmer from Northwest China's Shaanxi province and has been picking grapes for 18 years at the vineyard. Regarded as an expert in grape cultivation and harvesting, the 53-year-old knows the best time for watering the grapes to make them sweet and tasty.

"Our winery depends on these experienced staff to produce good quality wines," Yuan says.

Xu Hongjuan, 48, has worked as a wine fermenting worker for 16 years at the winery. She used to be a laborer before Yuan hired her.

"The winery has given my family much help. When one of my family members was sick, it provided me with financial support," Xu says.

With the development of the wine industry, Ningxia has created 130,000 jobs for local farmers, many of whom are migrant women like Su, Wang, and Xu.

"The small grapes have contributed to people's livelihood by boosting their income. At Ningxia's main resettlement area for migrants, the eastern foothills of Helan Mountain are home to 1.23 million migrants," Liang, the Party chief, says.

According to Liang, one-third of the income of migrants, which stands at 1 billion yuan, comes from the wine industry, enabling them to become better-off.