China and Europe Race for First Space-Based Gravitational Wave Observatory (xataka.com)

• Taiji optical core ground test successful, enabling phase two launch
• Three-satellite formation will use laser interferometry
• ESA's LISA slated for 2035 launch
• Space-based detection avoids seismic interference

"China's Taiji mission has passed a key milestone: the optical interferometer core has been successfully tested on Earth, clearing the way for the launch of the second phase. Taiji consists of three spacecraft forming a laser-linked triangle in space to detect gravitational waves. Europe's LISA mission is similar but planned for 2035, giving China a potential lead. Space-based detectors avoid seismic noise and other terrestrial interference."