Happened before the seminar: I was promptly presented to cooperators and other interested parties. But the headmaster Li Bao Wen became sick, and I was introduced only after four days. I suggested him then a lecture for students and professors, with an English text I had written for a previous occasion. Then we prepared a test lecture with a class of third-year students, who managed very well. Almost at the end of my service LiBao proposed a seminar on 'Plant Engineering' for local industry technicians, who succeeded. They then asked me to stay another two mons to replicate. But I had other commitments and refused the proposal.

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