  The X-ray transient MAXI J1836-194 is a newly-identified Galactic black hole
binary candidate. As most X-ray transients, it was discovered at the beginning
of an X-ray outburst. After the initial canonical X-ray hard state, the
outburst evolved into a hard intermediate state and then went back to the hard
state. The existing RATAN-600 radio monitoring observations revealed that it
was variable on a timescale of days and had a flat or inverted spectrum,
consistent with optically thick synchrotron emission, possibly from a
self-absorbed jet in the vicinity of the central compact object. We observed
the transient in the hard state near the end of the X-ray outburst with the
European VLBI Network (EVN) at 5 GHz and the Chinese VLBI Network (CVN) at 2.3
and 8.3 GHz. The 8.3 GHz observations were carried out at a recording rate of
2048 Mbps using the newly-developed Chinese VLBI data acquisition system
(CDAS), twice higher than the recording rate used in the other observations. We
successfully detected the low-declination source with a high confidence level
in both observations. The source was unresolved (<=0.5 mas), which is in
agreement with an AU-scale compact jet.
