  The Tsinghua University-National Astronomical Observatories of China (NAOC)
Transient Survey (TNTS) is an automatic survey for a systematic exploration of
optical transients (OTs), conducted with a 60/90 cm Schmidt telescope at
Xinglong station of NAOC. This survey repeatedly covers ~ 1000 square degrees
of the north sky with a cadence of 3-4 days. With an exposure of 60 s, the
survey reaches a limited unfiltered magnitude of about 19.5 mag. This enables
us to discover supernovae at their relatively young stages. In this paper, we
describe the overall performance of our survey during the first year and
present some preliminary results.
