Professor Wenwen Song, of Aachen University in Germany, visits Harry at Queen Mary University of London. She is renowned for her work on steels and recently was awarded the title "RWTH Lecturer" in recognition of her outstanding teaching of both undergraduate and postgraduate students at Aachen. Pictures courtesy of Wenwen.
 Wenwen enjoying an after-lunch coffee |  As you will see later, the batman logo has significance. |
 Harry and Wenwen |  I remember meeting her at a small conference when she was doing her Ph.D. work with Professor Wolfgang Bleck |
 This is Max Dechen, Wenwen's son, who clearly is keen on spiderman and batman |  It looks like his "transformer" goods are bigger than his suitcase! |
 4th edition, 2017 |
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