  Flares are a major explosive event in our solar system. They are often
followed by coronal mass ejection that has a potential to trigger the
geomagnetic storms. There are various studies aiming to predict when and where
the flares are likely to occur. Most of these studies mainly discuss the
photospheric and chromospheric activity before the flare onset. In this paper
we study the coronal features before the famous large flare occurrence on
December 13th, 2006. Using the data from Hinode/EUV Imaging Spectrometer (EIS),
X-Ray Telescope (XRT), and Solar and Heliospheric Observatory (SOHO) /Extreme
ultraviolet Imaging Telescope (EIT), we discuss the coronal features in the
large scale (~ a few 100 arcsec) before the flare onset. Our findings are as
follows: 1) The upflows in and around active region start growing from ~10 to
30 km /s a day before the flare. 2) The expanding coronal loops are clearly
observed a few hours before the flare. 3) Soft X-ray and EUV intensity are
gradually reduced. 4) The upflows are further enhanced after the flare. From
these observed signatures, we conclude that the outer part of active region
loops with low density were expanding a day before the flare onset, and the
inner part with high density were expanding a few hours before the onset.
