Shanghai Astronomical Observatory, which leads the

 country in very-long-baseline interferometry, the technique the telescope array used for

the black hole image, took the lead in organizing and coordinating Chinese researchers particip

ation in the EHT observations and studies, Shen said. That allowed Shanghai to b

e one of the six cities worldwide involved in the simultaneous news conferences on Wednesday.

No Chinese telescope-including the Five-hundred-meter Ape

rture Spherical Telescope, the world’s largest filled-apertur

e radio telescope, in Guizhou province-was involved in the EHT observations.

Yuan Yefei, a professor in the University of Science and Technology of Chi

na’s astronomy department, also an EHT team member, said the Guizhou telesco

pe did not take part mainly because its wavelength band was not what EHT needed for this observation.