Yicheng obtained his Bachelor’s degree from Tsinghua University. He is now working on the CaF laser cooling experiment. He has always been fascinated with new technologies and curious about how everything works. He learned a lot of these during his childhood by taking things apart, which left his parents with a pile of garbage. After over 20 years of experience in dismantling, he now finally knows how to put things back together and to make something new and hopefully useful out of them.