The Extreme Optoelectromechanix Laboratory (XXL) was founded by Professor Ya Cheng at the East China Normal University (ECNU) in 2017.In the past nearly two decades, Professor Ya Cheng's group focus on development of laser fabrication  technologies based on ultrafast laser sources. The advances have led to innovative micro- and nanostructures for applications ranging from photonics and microfluidics to microelectronics and 3D printing. The XXL provides a platform for domestic and international collaborations.