Beijing - Nestled among trees in eastern Beijing, a cozy cafe welcomes visitors with floor-to-ceiling windows overlooking lush greenery. The aroma of freshly brewed coffee fills the air, making the space feel more like a bucolic retreat.

This photo taken on June 6, 2026 shows the skyline after a rain in Beijing, capital of China. (Photo/Xinhua)

But this is no ordinary coffeehouse. A short walk down a bright corridor reveals an entirely different scene. Giant overhead grab cranes glide above mountains of household waste, feeding furnaces that help keep the megacity running. The cafe belongs to one of China's largest waste treatment facilities.

The surprising contrast is exactly what the operators of the Beijing Chaoyang Circular Economy Industrial Park hope people will experience. By eliminating the sights and smells traditionally associated with waste disposal, the park aims to change public perceptions of what a waste treatment facility can be.

Covering nearly three square kilometers, the waste park gobbles up more than 8,000 tons of municipal solid waste every day from Beijing's populous Chaoyang District.

Managing waste for a metropolis of over 20 million people is usually a story of crisis. For decades, global megacities have choked on their own trash, wrestling with landfill limits and toxic emissions. But here, waste is undergoing a profound metamorphosis.

"What comes in is urban waste, but what we output back to society is green, low-carbon products," explains Pi Meng, chairman of Beijing Chaoyang Environment Group, the state-owned enterprise operating the park.

"Trash is transformed into green electricity, gas, and thermal energy. The leftover ash becomes construction bricks, avoiding the need for landfills, while the leachate is purified into recycled water for 100 percent reuse," Pi said. "This is the true realization of a circular economy."

According to Pi, instead of a traditional siloed approach, the park operates like a synchronized ecology. Household food waste is digested into biogas and industrial lipids, which are later refined into biodiesel and sustainable aviation fuel.

Everyday household garbage is fed into massive incinerators, generating over 500 million kilowatt-hours of green electricity annually, enough to power hundreds of thousands of local homes.

The park is set to become one of the capital's first waste facilities to feed residual thermal energy directly into the municipal heating network, warming residents' radiators during Beijing's freezing winters.

Even the solid residue left after burning is mixed with crushed construction waste to be pressed into "permeable bricks," the very building blocks of the landscaping walls just outside the cafe.

With a resource conversion rate exceeding 85 percent, the park has evolved into a bustling resource hub whose overall carbon emissions hover close to zero.

Behind this green transformation lies something else: artificial intelligence. According to Pi, achieving such high efficiency would not have been possible without the development of an AI-powered smart incineration system.

One of the biggest challenges in waste incineration is uncertainty. No two truckloads of garbage are exactly the same. Food waste, plastics, paper and moisture content vary from season to season and even hour to hour, making combustion conditions change constantly.

Traditionally, maintaining stable operations depended heavily on experienced operators. "They could judge the furnace simply by looking at the color of the flame," Pi said. The problem was that such expertise took decades to accumulate and was difficult to replicate.

To bridge this gap, engineers set out to develop an AI system capable of learning from these masters. The effort, however, proved more complicated than expected.

"At first, AI engineers didn't understand waste incineration, while environmental engineers didn't understand artificial intelligence," Pi recalled with a laugh. "They were speaking the same language, but they couldn't understand each other."

The team combined more than a decade of second-by-second operational data with digital twin technology. They successfully transferred the collective expertise accumulated by generations of veteran operators to the machine.

The result is an intelligent system that acts as the facility's "eyes, brain, and hands." It continuously analyzes furnace conditions, predicts changes up to 180 seconds in advance, and automatically optimizes combustion, emissions and energy efficiency.

"It's like a doctor anticipating a disease and writing a preemptive prescription before symptoms even manifest," Pi said. "Without this three-minute foresight, the system would either risk failing emission standards or default to an excessive use of chemical reagents, which would be a costly, redundant strategy just to ensure compliance."

"This predictive capability is our most precious asset, placing us at the global forefront," Pi added proudly.

The empirical data speak for themselves. After more than a year of full operation, steam stability has improved by up to 36 percent, power generation efficiency is up by 2.4 percent, and manual labor intensity has plummeted by over 80 percent. "Now AI is doing all the heavy lifting, doing it smarter, cleaner and better", Pi said.

The park's integrated circular economy model has attracted growing international attention. Delegations from Europe, Africa and Asia have visited to explore how Beijing tackles one of the most pressing challenges of modern urbanization.

Pi observes that while Europe has long maintained advantages in equipment manufacturing and emission-control technologies, China is rapidly building strengths in AI-enabled operational systems.

"We learned from the world," Pi said. "Now we hope some of our innovations can contribute back to it."

The United Nations Human Settlements Programme has highlighted the park's circular economy model as an exemplary case of sustainable waste management for megacities, while the International Solid Waste Association has selected its integrated approach for global promotion.

Officials, researchers and industry representatives from countries including Kenya, Vietnam, South Africa and Kazakhstan have also come to explore how the "Chaoyang Solution" could help rapidly urbanizing regions in the Global South.

Standing beside the cafe that overlooks the sprawling industrial complex, Pi reflected on the journey.

"People come here expecting to see a garbage plant," he said. "They leave seeing the possibilities of a circular economy."