Stellar magnetic activity:
1. Doppler imaging of starspot pattern
Using Doppler imaging technique, we are performing the study on starspot activities of cool stars in different evolution stages, including the pre-main-sequence, main-sequence, subgiant, and giant stars. The goals are deriving the diversity of starspot activities, and providing some clues for understanding stellar magnetic activity and its evolution.
2. Chromospheric activity of cool stars
By means of the large wavelength region of modern high-resolution echelle spectrograph, we also monitor several chromospheric activity indicators, Balmer series of H lines, CaII HK, CaII IRT, HeI D3, Mg Ib, NaI D1D2 which are formed in different atmospheric heights, besides above starspot activity study of cool stars. To do so, we can get the information on stellar plages, flares, and rotation modulation of chromospheric activity.
3. Stellar prominence activity
Using above spectral data, we also hope to hunt the stellar prominence events in these targets by using dynamic spectrum trace method.

Extrasolar planet system:
1. The Rossiter–McLaughlin (R-M) effect
For a group of transiting exoplanet systems, we are studying its orbital alignment by observing their R-M effects so that some clues of their dynamic evolution and formation can be found.
2. The star-planet interaction (SPI)
We are planning to observe several host stars of exoplanet systems so as to find some evidences on their SPI by using high-resolution spectroscopy. Such kind of information can help us to understand the role of magnetic field in the formation and evolution of exoplanets. Furthermore, this is the only way to know some of the properties for planet magnetic field.