Ultra-precision machining is used to process various materials such as metals, polymers, and brittle materials at the Center of Micro/Nano Manufacturing Technology (MNMT) at Tianjin University. Such processing is a key part of precision engineering, which is a discipline that combines electrical, software, electronic, mechanical, and optical engineering in order to design machines, fixtures, and other structures with exceptionally high precision and stability. Precision engineering breaks through the precision limit of conventional manufacturing and metrology, and finds a wide range of applications in machine tools, biomedical implants, optoelectronic devices, and many other fields.