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Return of delicate aquatic plant signals Chinese lake's revival_我的网站

A |     京津冀联合发布7项共建计量技术规范区域性计量技术规范累计达49项日报讯（记者马彦铭）8月5日，京津冀三地市场监管区域协作会议在张家口召开。会上，三地市场监管部门联合发布7项共建计量技术规范，覆盖生物医药、医疗卫生、产业协同、生态环保及民生保障等多个关键领域，其中2项规范填补国内相关领域空白。

B | 本次发布的7项规范，通过联合评估立项、季度协同推进、统一发布实施和集中效果评估的全流程管理体系，进一步统一区域内计量校准规范，推进技术协同，有效消除了跨区域检测差异，为产业升级、城市治理和民生保障提供了坚实技术支撑。这是自2017年启动计量技术规范共建机制以来，三地集中发布的第十批区域性技术文件。    

    Workers harvest Ottelia acuminata at a planting base at Yong'an Village of Eryuan County in Dali Bai Autonomous Prefecture, southwest China's Yunnan Province, on Oct. 18, 2024.(Photo by Luo Xincai/Xinhua)Under the summer sun, Erhai Lake in southwest China's Yunnan Province glistens thanks to its clear blue water dotted with floating white blossoms. Tourists stroll and cycle around the spot, where limpid waters, lush mountains and blooming flowers combine in weaving a picturesque scene.
The delicate blossom seen floating there is Ottelia acuminata, an aquatic plant endemic to China, which is known to have extremely strict water quality requirements. It demands high water transparency, cleanliness and calcium content, and survives only in unpolluted waters, serving as a reliable natural indicator of aquatic ecological health.
Its large-scale revival vividly testifies to Erhai Lake's remarkable ecological restoration achievements.
China's Ecological and Environmental Code, enacted on Saturday, stipulates nationwide protection and restoration of river and lake ecosystems, providing solid legal support for systematic water ecological governance across the country.
As China advances its Beautiful China initiative, this code is expected to strengthen rule-of-law guarantees for ecological protection and provide fresh impetus for the country's green and low-carbon transition.
In the early 1990s, agricultural pollution worsened Erhai Lake's water quality, causing frequent blue-green algae outbreaks. A severe algae bloom hit the lake in 1996, leaving the water turbid and smelly. As the environment degraded, Ottelia acuminata nearly disappeared from the lake.
Thanks to years of targeted ecological protection and restoration efforts, the lake's water quality has improved steadily, maintaining an excellent Grade II standard from January to June 2026, and creating favorable conditions for the return of Ottelia acuminata.
Official data show that the plant's coverage on Erhai Lake has surged from 90,000 square meters in 2021 to 950,000 square meters in 2026, marking a remarkable ecological recovery.
The improved water environment has also brought tangible economic benefits, turning the lake's ecological advantages into a sustainable industry. From lake ecology to farm cultivation and consumer products, Ottelia acuminata's dual ecological and economic value has been fully realized.
In 2018, environmental worker Zhong Lan noticed the edible plant's great potential for water purification and industrial development. With support from local authorities and Shanghai Jiao Tong University in eastern China, she started a company and built a professional research base in 2024, developing standardized planting techniques that enable high-yield, repeated harvests and offering jobs for local villagers.
Villager Li Xinyuan, who quit Ottelia acuminata cultivation years ago due to low profits, resumed planting in 2023 and earns a stable monthly salary of 4,500 yuan (about 663 U.S. dollars) at the base.
His fellow villager Du Hongquan earned over 100,000 yuan last year from growing the plant and has more than doubled his planting area this year. "The base takes full charge of sales, so we can plant without any worries," Du said.
Eryuan County, the source of Erhai Lake, now has more than 200 hectares of Ottelia acuminata plantation area, creating numerous jobs yearly. The plant has been developed into a diverse range of products like tea, plant-based coffee and cookies.
"I used to think it was exclusive to Yunnan, but I can try it elsewhere too," said a tourist surnamed Ai after tasting the plant at a hotpot restaurant in Hangzhou, east China's Zhejiang Province.
The beautiful lakeside scenery at Erhai has also boosted local tourism. In 2025, Dali received over 120 million tourist visits, attracting visitors to enjoy lake views and experience local Bai ethnic culture, with 407,000 long-term visitors.
Last month, the State Council issued a plan for building a Beautiful China during the 15th Five-Year Plan period (2026-2030), setting out the overall requirements, targets, key tasks and major projects for comprehensively advancing this initiative.
According to the plan, China will achieve overall improvement in ecological and environmental quality and make significant progress toward building a Beautiful China by 2030, with green production and lifestyles largely established and the carbon peaking target reached on schedule.
。至此，三地累计发布的京津冀共建计量技术规范达49项，有效形成跨区域计量技术协同的“京津冀样本”，其工作模式已在华北、长三角等地区推广应用。本次发布的计量技术规范，在生物医药与医疗卫生领域，《胎心模拟仪校准规范》为全国首个胎心模拟仪器类校准规范，填补了母婴诊疗设备量值溯源空白。《医用温度报警器在线校准规范》与《澄清度测定仪校准规范》匹配药典要求，为保障药品存储安全与药品检测合规提供了重要技术依据。在产业协同与生态环保领域，《垂直轴偏差测量仪校准规范》统一包装容器测量标准，消除了跨区域检测误差，为食品、药品、化妆品等产业一体化发展赋能。《化学发光定氮仪校准规范》完善总氮检测量值溯源链条，支撑区域环境监测与科研单位生产和研究。

C | 在民生保障与安全监管领域，《氧化性固体试验仪校准规范》创新质量变化速率测算方法，攻克燃烧速率校准难题，填补国内相关领域空白，为海关、化工、民航危险品安全监管提供技术支撑。《电子温压转换膜式燃气表检定规程》强化计量数据精准与安全，保障居民燃气计量公平公正。另外，三地市场监管部门还将建设京津冀特种设备技术专家库，充分发挥专家在标准政策制定、科研课题攻关、突发事件处置、安全风险研判、检验检测支撑及疑难技术问题解决等方面的智力支撑作用，提升区域特种设备安全治理能力与水平。

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Published on:06:01:06