"The possibility that the suspicious signal is some kind of radio interference is also very high, and it needs to be further confirmed or ruled out. This may be a long process," Zhang Tongjie, chief scientist of China ET Civilization Research Group told Science & Technology Daily [0]

Most of the sensational headlines coming from China died after someone actually went back and asked the team if they were sure.

Which was then followed up with:

"The signals that we found so far are all [radio frequency] interference, they're not from extraterrestrials, they're from terrestrials," Dan Werthimer, a SETI researcher at the University of California, Berkeley, who coauthored a preprint paper about the findings, told Futurism. [1]

[0] https://mp.weixin.qq.com/s/BtLLCb0GlPxjmhbAz5pUOw

[1] https://futurism.com/fast-signal-not-aliens-scientist