The South China Morning Post of December 17, 2018  not only “let the cat out of the bag,” but “opened up a can of worms” with regard to militaries wanting to control the ionosphere for decades.
The militaries have been in a race to control the ionosphere for decades. 
It seems China has been cooperating with other countries’ scientists regarding ionospheric manipulation, the latest being with Russia, according to the South China Morning Post.
A June 2018 test caused a physical disturbance over 49,000 square miles!
However, Russia has been “into” ionospheric manipulation since the early 1980s!
The Sura base in Vasilsursk [Russia] is believed to be the world’s first large-scale facility built for the purpose. Up and running in 1981, it enabled Soviet scientists to manipulate the sky as an instrument for military operations, such as submarine communication.
The Sura facility has also conducted joint research with France and the United States, according to papers published in academic journals. 
So when did the United States come on board with ionospheric manipulation?
“The US military learned from the Russian experiment and built a much larger facility to conduct similar tests.”  It is called HAARP, High Frequency Active Research Program.
IS HAARP Dangerous; HAARP and Weather Control (2010)
So, when was HAARP built?
Construction on the HAARP Research Station began in 1993. The first functional facility was completed by the winter of 1994 with three passive, diagnostic instruments and an evaluation prototype HF transmitter consisting of 18 antenna elements with a net radiated power of 360 kW. By 1999, HAARP had been developed to an intermediate level capable of high-quality ionospheric research with the addition of several additional instruments to the diagnostic suite and an improved HF transmitter with 48 antenna elements and a net radiated power capability of 960 kW. Between 2003 and 2006, new instruments were added to the facility, including a UHF ionospheric radar and a telescopic dome for optical observations. The HF transmitter now consists of 180 antenna elements having a net radiated power capability of 3,600 kW or 3.6 MW. (Source: University of Alaska)
“The HAARP facility could generate a maximum 1 gigawatt of power, nearly four times that of Sura.” 
“The gigawatt (GW) is equal to one billion (109) watts or 1 gigawatt = 1000 megawatts. This unit is often used for large power plants or power grids.” (Source: Wikipedia)
Can you imagine the heating capabilities such an amount of microwave energy can put into the ionosphere, plus its capabilities to affect, or steer, the Jet Stream?
Concerns have been expressed by researchers and scientists regarding the abilities of such facilities, i.e., to modify weather, which the U.S. Air Force has been implicated in with Solar Radiation Management, i.e., using planes to spray what are called “chemtrails,” and in the 191-page May 1996 report about “owning the weather by 2025.”
Can these man-made frequency programs modify the weather; create ‘natural’ disasters including hurricanes, cyclones and earthquakes, which have been more frequent and severe globally in recent years?
The ultra-low frequency waves produced by such powerful facilities, especially scalar clouds (see Resources below) could have effects on humans in several ways: the operation of the human brain; barometric pressure changes affecting chronic diseases such as arthritis and other rheumatic diseases; plus other symptoms which medicine and science don’t want to investigate, as no responsible research has been done in those areas of human health and adverse effects from EMFs/RFs/ELFs.
However, the standard microwave industry ‘consensus science pap’ is complete denial of any adverse health effects by microwave industry professional associations, i.e., ICNIRP, Raytheon, and the U.S. Federal Communications Commission, despite NO responsible research studies.
However, according to Professor Gong Shuhong, a military communication technology researcher at Xidian University, “Such studies must strictly follow ethical guidelines. Whatever they [generated microwaves] do, it must not cause harm to the people living on this planet.”
“China is now building an even larger and more advanced facility in Sanya, Hainan, with capability to manipulate the ionosphere over the entire South China Sea, according to an earlier report by the South China Morning Post.” 
Question: If countries can cooperate on this kind of stuff, why can’t they cooperate on making life less threatening for humans, wildlife and all life forms; plus clean up the planet from pollution, which capitalist money-making industries invent and emit, not consumers who, literally, are forced to use dangerous services, i.e., nuclear power, 4G and the coming 5G, and toxic, poisonous chemical products?