Shi, J. JACoW Publishing Geneva, Switzerland X-band high-gradient accelerating structures operating at the gradient of 80-100MV/m are proposed for different applications including compact linear collider and compact X-ray facilities. A traveling-wave structure as well as single-cell test structures with choke-mode damping feature were developed in Tsinghua University and high-power tested. A prototype structure with CLIC-based design, namely T24-THU#1, has reached 110 MV/m and several choke-mode single-cell structures reached 130MV/m during test. The high-gradient technique will be applied to Tsinghua Thomson-scattering X-ray source with two new developed 0.6m-long structures for 80MV/m acceleration.