  The East Asian VLBI Network (EAVN) is an international VLBI facility in East
Asia and is operated under mutual collaboration between East Asian countries,
as well as part of Southeast Asian and European countries. EAVN currently
consists of 16 radio telescopes and three correlators located in China, Japan,
and Korea, and is operated mainly at three frequency bands, 6.7, 22, and 43 GHz
with the longest baseline length of 5078 km, resulting in the highest angular
resolution of 0.28 milliarcseconds at 43 GHz. One of distinct capabilities of
EAVN is multi-frequency simultaneous data reception at nine telescopes, which
enable us to employ the frequency phase transfer technique to obtain better
sensitivity at higher observing frequencies. EAVN started its open-use program
in the second half of 2018, providing a total observing time of more than 1100
hours in a year. EAVN fills geographical gap in global VLBI array, resulting in
enabling us to conduct contiguous high-resolution VLBI observations. EAVN has
produced various scientific accomplishments especially in observations toward
active galactic nuclei, evolved stars, and star-forming regions. These
activities motivate us to initiate launch of the 'Global VLBI Alliance' to
provide an opportunity of VLBI observation with the longest baselines on the
earth.
