The publication of this volume coincides with the 55th anni versary of the discovery of the neutron and Landau's suggestion at the time that one could make stars out of the new particles. This year also marks the twenty-fifth anniversary of the detection of Sco X-I, the first known X-ray binary system, and follows by just twenty years Jocelyn Bell Burnell's discovery of that "little bit of scruff" o her chart record that led to the recognition of radio pulsars. As Q. Y. Qu, President of Nanjing University noted in his welcoming address, however, Chinese astronomers have been observing the...

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