Wuhan City, Hubei Province, central China - March 28, 2018 (CCTV - No access Chinese mainland)
1. Aerial shot of Huazhong University of Science and Technology
2. Entrance of cave laboratory (fast motion)
3. Professor Luo Jun talking to team members
4. Various of facilities in cave
5. SOUNDBITE (Chinese) Luo Jun, Academician, Chinese Academy of Sciences (starting with shot 4):
"This is our Earth. Above the Earth, at the height of 100,000 kilometers, for example, we'll place three satellites and then connect them with laser beams. When there's a wave of time and space and when it spreads to the Earth, it will shrink on the one side and stretch on the other. By the interference of laser, we can measure the distance between the two satellites. It looks like a triangle, like a harp, and the hands that are playing it are the gravitational waves. That's why we call it 'Tianqin' (Heaven's Harp)."
6. Various of center for gravitational research
7. Various of lights, classroom, poster in cave laboratory
8. Various of professor Luo Jun talking about devices

FILE: China - Exact Date and Location Unknown (CCTV - No access Chinese mainland)
9. Various of professor Luo Jun talking about devices
10. Various of devices in laboratory

Tianqin, China's gravitational wave research project, plans to launch three satellites around 2030 to measure the change of time and space, said Luo Jun, initiator of the project and an academician of the Chinese Academy of Sciences (CAS) on Wednesday during an interview with China Central Television.

Gravitational waves are "ripples" in the fabric of time and space caused by movements of celestial bodies in the universe. Albert Einstein predicted its existence in 1916 in his theory of relativity. And in 2016, scientists with the American Laser Interferometer Gravitational-wave Observatory (LIGO) discovered gravitational waves.

According to experts, Tianqin, different from the research by the U.S. ground-based observatory, will observe the waves from space. It is likely to collect better information, as a larger black hole may be detected from space than the one detected from the ground.

Luo Jun said he and his team will carry out a four-stage plan over the next 15 to 20 years to detect the waves with three high-orbit satellites.

They have built a cave laboratory in the Huazhong University of Science and Technology in Wuhan City of central China's Hubei Province, where Luo and his team are working on the detecting devices of gravitational waves.

"This is our Earth. Above the Earth, at the height of 100,000 kilometers, for example, we'll place three satellites and then connect them with laser beams. When there's a wave of time and space and when it spreads to the Earth, it will shrink on the one side and stretch on the other. By the interference of laser, we can measure the distance between the two satellites. It looks like a triangle, like a harp, and the hands that are playing it are the gravitational waves. That's why we call it 'Tianqin' (Heaven's Harp)," Luo said.

With such a device system in the space, scientists will be able to measure the changes of time and space, according to Luo.