Qingdao operates an advanced 3D city map for smart urban management

https://en.people.cn/n3/2025/0530/c98649-20322033.html

A platform on real-scene 3D modeling of the city of Qingdao was launched in March 2021 under the leadership of the Qingdao Institute of Survey and Mapping

Qingdao’s varied topography – marked by hilly terrain and dramatic elevation changes – necessitated the use of oblique aerial imaging to capture raw imagery and build an accurate 3D model. The project team deployed manned fixed-wing aircraft equipped with 150-megapixel, five-lens oblique aerial cameras. The aerial survey covered the entire urban area, achieving a ground resolution of 15 centimeters and maintaining more than 70 percent image overlap to maximize accuracy.

In March 2022, following expert review, the project was officially launched for citywide application. Today, the platform covers Qingdao’s entire land area – 11,000 square kilometers – as well as 800 kilometers of coastline, 49 bays, and seven inhabited islands.

The 3D simulation platform has been shared with over 60 municipal departments. It supports more than 100 key functions, including disaster prevention and mitigation, urban planning, social governance, and urban renewal. The platform also underpins over 70 digital government service applications and records nearly 100 million uses annually. As an example, at the bureau’s headquarters, staff members examined two versions of a digital model for a former mining site in Qingdao’s West Coast New Area. The comparison revealed tangible signs of ecological restoration – more vegetation and a gentler slope. Qingdao is home to 898 legacy mine sites. In the past, inspecting these sites required a full month of on-the-ground efforts. Now, with the help of the 3D model, the same work takes just five days.

Since 2023, the city has carried out annual temporal updates to the city-scale 3D simulation platform, enabling it to track urban changes with precision and support data-driven lysis and evidence-based planning.

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In Shanghai, a French cargo vessel is refueld with green methanol

https://j.people.com.cn/n3/2026/0818/c95952-20489791.html

https://www.recordchina.co.jp/b990111-s50-c20-d0189.html

On August 17, 2026, at Shanghai’s Yangshan Port 8,000 tons of green methanol were used to refuel a cargo ship owned by the French shipping giant CMA CGM.

Green methanol is a key alternative fuel for reducing carbon emissions in sectors such as shipping and the chemical industry. According to Zhu Zhaokai, President of Shanghai Electric Group, this large-scale green methanol refueling operation demonstrates that China has established a complete industrial chain—spanning from large-scale production and onshore/maritime storage and transport to port-side refueling and shipboard utilization and will help drive the global shipping industry toward zero emissions.

The green methanol fuel supplied in this operation was primarily produced at Shanghai Electric’s “Integrated Demonstration Project for Wind Power and Biomass-Combined Green Methanol” in Taonan City, Jilin Province. The production process makes use of various resources, fully utilizing biomass materials—such as corn stalks from Taonan City—and green hydrogen generated from wind power.

A Raman-based strategy finds more ethanol-tolerant microbes from Baijiu fermentation

http://english.cas.cn/newsroom/research-news/202607/t20260729_1179357.shtml

http://10.1016/j.biortech.2026.135397

Scientists from CAS QIBEBT have developed a Raman-activated cell sorting strategy for the high-throughput discovery of ethanol-tolerant microorganisms based on their metabolic activity rather than growth.

Conventional microbial screening generally follows an “isolate first, test later” workflow, in which cells are cultivated under selective pressure, isolated, and evaluated. This approach is slow, labor-intensive and biased toward fast-growing or abundant microbes. This is important in solid-state baijiu fermentation, where rising ethanol concentrations stress microbial communities, while valuable but low-abundance active microbes are easily overlooked.

Therefore, the researchers shifted the criterion from whether a cell could grow under ethanol stress to whether it maintained active metabolism. They combined heavy-water (D₂O) labeling with single-cell Raman spectroscopy and a high-throughput Raman-activated flow cytometer known as FlowRACS. Metabolically active cells incorporate deuterium from D₂O into newly synthesized biomolecules, producing a characteristic carbon-deuterium (C-D) Raman signal. Based on this signal, the researchers derived a carbon-to-deuterium ratio (CDR) and a Raman tolerance index (RTI) to quantify the in-situ ethanol tolerance of individual cells.

The platform functionally sorted 2,400 cells per hour with an accuracy of 91.3%. One sorting round followed by culture from pit mud pretreated with 8% ethanol yielded six pure strains, all with an RTI above 50%, as opposed to only two among nine isolates from conventional agarose-plate screening. Overall, this strategy increased strain-mining efficiency 4.5-fold and phenotypic validation 7-fold, reducing the time required for key steps from days to hours.

Genomic and transcriptomic analyses revealed distinct tolerance mechanisms. Lactiplantibacillus plantarum (RTI = 85.1%) enhanced lactate dehydrogenase expression by 3.4-fold while maintaining high alcohol dehydrogenase activity, indicating adaptive redox balancing. Staphylococcus epidermidis (RTI = 62.2%) activated lipid synthesis and glycerol metabolism genes, indicating cell envelope remodeling. Both strains were rare in the original microbial community, demonstrating that function-based sorting recovers key microbes that are missed by abundance- or growth-based approaches.

The study could also be extended to acid, salt, and solvent tolerance, which would aid in building robust industrial chassis strain libraries. This work represents the latest progress of the iMAPS Consortium (in-situ Metabolic Atlas Projects @ Single-cell; www.iMAPS.info).

Gold recovery from waste liquid without chemicals

https://j.people.com.cn/n3/2026/0717/c95952-20478766.html

https://pubs.acs.org/jacsat/article/148/28/29854/5203821/Selective-Gold-Recovery-via-Thermally-Generated?searchresult=1

A new technology recovers gold from waste liquid using naturally occurring micro-droplets at the oil-water interface, simply by moderately heating the oil-water system—without the addition of any reducing agents, adsorbents, or catalysts.

The technology was developed by a team from the China University of Petroleum in Qingdao, in collaboration with researchers from Stanford University.

Drawing on their previous research into geological fluids—where they discovered that large numbers of chemically active micro-droplets are generated at oil-water interfaces under high-temperature conditions—the team formulated a bold hypothesis: “Could we selectively extract gold from complex waste liquids simply by utilizing the chemical properties of these micro-droplets?”

To test this, the team constructed a heat-driven oil-water interfacial reaction system. Moderate heating causes the continuous formation of micro-droplets (5–50 micrometers in diameter) at the oil-water interface. These droplets function like micro-reactors with high redox activity, continuously generating active species such as highly active electrons, hydrogen radicals, and hydroxyl radicals. This process enables the reduction of gold ions in the solution to elemental gold without the need for external reducing agents, catalysts, or adsorbents; furthermore, the coalescence and growth of these micro-droplets allow for the formation of millimeter-sized gold particles.

The study also elucidated the chemical mechanism by which the interfacial micro-droplets selectively recover gold. Experiments demonstrated gold recovery rates of 98.5% from complex aqua regia waste liquid and 97.0% from electronic waste leachate. The recovery time was further reduced through heating and cooling cycles, and a recovery efficiency of over 90% was maintained even when the oil phase was reused. In a scale-up experiment, 500 milliliters of gold-containing leachate were processed to yield 0.5657 grams of solid product. The gold achieved a purity of 99.4%, demonstrating high potential for application as an environmentally friendly technology for recovering precious metals from complex acidic wastewater.

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