Wenyuan’s paper was titled: "Enabling a Scalable High-Rate Measurement-Device-Independent Quantum Key Distribution Network: theory and experiment." Professor Lo’s group also took home this award in 2014. Congratulations!
Since 2011, QCrypt features a prize for the best student submission. A submission is eligible for the student prize if and only if the main author(s) is/are a student(s) at the time of the submission and will present the work at QCrypt, and further a significant portion of the work (at least 60%) must have been done by said student(s), including the majority of the key ideas.
More information on QCrypt can be found here: See http://2018.qcrypt.net/