China’s commercial launch industry is really getting off the ground.

The private Smart Dragon-1 rocket, built by the China Rocket Co. Ltd., completed its first mission Saturday (Aug. 17), successfully launching three small satellites to Earth orbit, Chinese media outlets reported. 

The milestone comes less than a month after a different Chinese company, iSpace, achieved the nation’s first private orbital launch and just a week after yet another firm, LinkSpace, pulled off a rocket landing after a test flight in Earth’s atmosphere.

Related: China in Space: The Latest News and Launches

The four-stage Smart Dragon-1 is similar in size and payload-launching power to Electron, the two-stage booster built by California-based company Rocket Lab. The Chinese launcher, also known as Jielong-1, is 64 feet (19.5 meters) tall and 4 feet (1.2 m) wide, and it weighs 25.5 tons (23.1 metric tons) at liftoff. The rocket can deliver about 440 lbs. (200 kilograms) of payload to a 310-mile-high (500 kilometers), sun-synchronous orbit, according to China’s state-run Xinhua news service.

China Rocket isn’t a purely private outfit. The company is a subsidiary of the China Academy of Launch Vehicle Technology (CALT), which itself is part of the state-owned China Aerospace Science and Technology Corporation (CASC). CASC is China’s main aerospace contractor, and CALT has built most of China’s venerable Long March rockets over the years.

Still, China Rocket’s existence continues the nation’s push to develop a native commercial-launch sector.

“Commercial launching will have a vast market in the fields such as low Earth orbit internet mobile communication and remote sensing,” China Rocket President Tang Yagang told Xinhua.

The company developed the solid-fueled Smart Dragon-1 in less than 18 months, Xinhua reported. The first mission will open the door to many more launches, if all goes according to plan; China Rocket wants to fly four more times before the end of 2020, Xinhua reported.

California’s Rocket Lab also plans to ramp up its launch cadence. The company, which launched its eighth Electron mission this morning (Aug. 19), eventually wants to fly weekly, or perhaps even more frequently than that.

Rocket Lab is taking multiple steps to make this happen. The company is building a second launch site in Virginia, for example, to go along with the already-operational one in New Zealand. And Rocket Lab plans to reuse Electron first stages after plucking them out of the air with a helicopter.

The three payloads lofted by Smart Dragon-1 on Saturday were developed by three Beijing-based companies, Xinhua reported. One satellite will provide communications services, another is devoted to remote sensing, and the third is designed to help pave the way for an “Internet of Things” constellation.

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The Centers for Disease Control and Prevention announced Saturday that it’s investigating a puzzling burst of severe lung-disease cases linked to e-cigarette product use or “vaping.”

Between June 28 and August 15, health officials have counted 94 probable cases of severe lung illness in 14 states, the CDC said. Officials haven’t found any conclusive evidence to suggest that an infectious illness is behind the cases, the agency added. The only common thread so far appears to be recent vaping by those afflicted.

The CDC is working in close consultation with officials in some of the hardest-hit states, including Wisconsin, Illinois, California, Indiana, and Minnesota. Wisconsin alone reported 30 of the 94 cases.

In many of the illnesses, people experience shortness of breath, fatigue, chest pain, cough, and weight loss, the Wisconsin Department of Health Services reported in its outbreak investigation notice. The cases appeared mainly in teens and young adults at first, the department said. But now officials are seeing cases in older adults as well.

Investigators are trying to find out more information about the specific e-cig products and brands that the afflicted used. Officials in Wisconsin have reportedly sent some cartridges of suspect vaping liquids to the Food and Drug Administration for testing. Wisconsin’s health officials noted that “[t]he products consumed could include a number of substances, including nicotine, THC, synthetic cannabinoids, or a combination of these.”

Dubious products

In one Wisconsin case, a 26-year-old man with asthma ended up in an intensive care unit in July with difficulty breathing after vaping THC oil he bought on the street, NPR reported. (THC or Tetrahydrocannabinol is the primary psychoactive ingredient in marijuana.) The man’s blood-oxygen levels dropped to just 10% and he was placed in medically induced coma.

Now out of the hospital, he told NPR that he suspects his illness was linked to the THC oil. "The oil in the cartridge was really watered down. And it was pee-colored, it wasn’t supposed to be that color, it’s supposed to be dark amber," he said.

He cautioned other people who vape THC: "If you are going to smoke, just stick to the dispensaries. Don’t buy stuff off the street where you don’t know where it’s coming from."

Juul Labs, the dominant e-cigarette maker in the US that has drawn scrutiny from federal regulators, said in an emailed statement to Reuters that “[l]ike any health-related events reportedly associated with the use of vapor products, we are monitoring these reports.”

“These reports reaffirm the need to keep all tobacco and nicotine products out of the hands of youth through significant regulation on access and enforcement,” the statement read. Juul went on to note that some of the cases appeared to involve THC, a controlled substance that the company does not sell.

“We also must ensure illegal products, such as counterfeit, copycat, and those that deliver controlled substances, stay out of the market and away from youth,” Juul wrote.

While e-cigarette proponents argue that the products are significantly safer than traditional cigarettes and can help smokers quit, Juul and others have faced intense criticism for allegedly marketing their products to teens, helping to spark what the FDA has described as an “epidemic of youth e-cigarette use.”

Beyond the potential for life-long addiction to nicotine, health officials fear possible long-term health impacts of vape liquids, which have been found to have a wide variety of chemicals and components. Some contain flavorings that have been tested for safety in edible foods, but not for inhalation. Researchers reported that some vape liquids—including ones sold by Juul—can create irritating compounds when heated.