My research focuses on:
(1) the formation and evolution of the far-infrared luminous galaxies observed with Herschel. Developed a new algorithm in selecting very high redshift dusty galaxies;
(2) find and study gravitationally lensed high-redshift galaxies in the very early universe. Co-discovered the two most distant Lyman break galaxies at z~10;
(3) X-ray properties of active galaxies, and implications for the putative black hole, of particular building the largest sample of local AGNs observed with the Chandra grating to date.