A 5,000-square-meter airborne wind power kite, the world's largest core component of a high-altitude wind power generation system, officially departed from Beijing on Friday for testing in north China's Inner Mongolia Autonomous Region.
The shipment of the key component of the very system to the test site signifies the commencement of field flight tests for China's first national-level key research and development program for high-altitude or airborne wind power generation.
The high-altitude wind power generation system comprises three main components which are an airborne unit, a tethering cable and a ground-based unit. The airborne wind power kite delivered for testing this time is the core part of the airborne unit. The flexible cover of the kite spans an expansive area of 5,000 square meters which is equivalent to 12 standard basketball courts.
"Compared with regular land-based wind power generation facilities, the high-altitude wind power generation system can save up to 95 percent of land use, reduce steel consumption by 90 percent and lower the cost per kilowatt-hour by 30 percent. And at the same time, the high-altitude wind power generation system is able to connect multiple flying units, which is of great advantage to large-scale application and commercialization," said Luo Bixiong, principal researcher at Energy China.
High-altitude wind power is often described as the "uncharted territory" in the field of new energy with its features of high speed, stable direction and high energy density. In recent years, with advances in material, aerostat and lightweight motor system technologies, the high-altitude wind power generation technology is gaining momentum as a sustainable and renewable solution for global energy transition.
China, one of the world's richest countries in high-altitude wind resources, has developed a series of independent intellectual property rights in this field, which could realize its self-reliance in the entire industrial chain for technology and equipment.
"This test marks China's progress in high-altitude wind power generation from kilowatt-scale to megawatt-scale, and from capturing wind at 1,000 meters to 3,000 meters, or even 5,000 meters. In the future, it will be highly possible to drive the development of such industries as aviation, energy and environmental protection," Luo said.
The kite will be transported to Inner Mongolia's Alxa Left Banner where the on-site flight tests will officially begin.
World's largest airborne wind power kite departs for Inner Mongolia for flight test
Li Yuhua, a farmer-turned forest ranger from a mountainous village in Dulongjiang Town, southwest China's Yunnan Province, has spent nine years protecting the forests in her hometown while helping local people increasing their incomes.
Li's family was once a registered impoverished household, relying mainly on corn farming for living. Things began to change for her family in 2016 when China launched a policy allowing registered impoverished population to work as ecological forest rangers, and Li became one of the first ecological forest rangers in the town.
"When I first began to work as a forest ranger, it was hard for me even to climb mountains, let alone climb rocks and cross rivers. But I told myself that since the country gave me this opportunity, I must do it well. I worked hard to improve my physical fitness and learn new skills, always actively taking the missions of patrolling mountains," said Li.
As Li often wears a colorful, vibrantly striped "Dulong blanket," a traditional clothing of the Dulong ethnic group, the villagers call her the "rainbow ranger."
"I think the name 'Rainbow Ranger' is beautiful. It makes me feel like a rainbow for us women of Dulong ethnic group guarding our homeland," Li said.
Dulong is a mountain-dwelling ethnic group in southwest China. It is one of the least populous of China's 56 ethnic groups, and the people were known for "direct transition" from primitive life to the modern socialist society at the founding of the People's Republic of China in 1949.
Most Dulong people live in Dulongjiang Town, where an inhospitable mountainous terrain used to thwart the place's development for decades. The town remained to be one of the poorest areas in Yunnan Province and even in the entire country. Thanks to government inputs and the development of industries with local features, the Dulong people have been experiencing remarkable life changes. In 2018, the Dulong ethnic group shook off poverty as a whole.
Beyond safeguarding forests, Li took the lead in developing non-timber forest-based economy in the town, guiding local residents to grow plants like Chinese black cardamom and wild-simulated lingzhi mushrooms as well as raising cattle and bees.
In 2025, the total output value of the town's non-timber forest-based economy reached nearly 30 million yuan (around 4.3 million U.S. dollars), with the annual average income of 43 households increasing by more than 20,000 yuan (around 2,900 U.S. dollars) each.
Li also established a cooperative for Dulong blanket making, attracting more than 170 women to learn traditional weaving techniques. They have developed 12 types of cultural and creative products, including shawls and scarves, and sold them worldwide through livestreaming, generating wealth for themselves.
"In the past, we only wove blankets for our own use. Now she teaches us to make the cultural and creative products and sell them. Last year, I earned more than 4,000 yuan (around 580 U.S. dollars) from weaving. I spent the money on my children's school fees and new appliances for my house," said Mu Jianying, member of the cooperative.
Li's dedication to both forestry and rural revitalization has earned her widespread recognition. In 2024, she was honored as model of ethnic solidarity and progress and received the title certificate from President Xi Jinping. She was also awarded the title of National March 8 Red-Banner Pacesetter, the highest honor presented by the All-China Women's Federation to the country's outstanding women, ahead of the International Women's Day observed on March 8.
Li said her achievements are the result of collective efforts.
"I often think that one person's strength is very limited, but the strength of a group is great. There are 195 ecological forest rangers like me protecting this land in the Dulongjiang Grand Canyon," she said.
As a female forest ranger, Li shared a message for women ahead of the International Women's Day.
"To mark the International Women's Day, I want to say to all my sisters: No matter what position we are in, as long as we are willing to endure hardship and work hard, we will surely weave our own rainbow," she said.
Forest ranger dedicated to guarding green mountains in Yunnan
Forest ranger dedicated to guarding green mountains in Yunnan
