Taxonomy of meanings for 於是:  

  • THEREUPON
    • VPadS1.postS2from then onthereafter, from then on, from that point onwards
    • VPadS1.postS2logicand then by the logic of the situation, and so
    • VPadS1.postS2after speechHaving said that... [a large number of items from TEMP must be moved here]
    • VPadS1.postS2At that point, Whereupon; at that time; at this time
    • VPadV{PRED}.postN{SUBJ}:postSN then V-ed
    • VPadVunder such circumstances
    • VPpostVat that moment
  • THEREFORE
    • VPadS1.postS2for this reason, and thus, and so
    • VPadV{PRED}.postN{SUBJ}:postSN therefore VERBed
  • HERE
    • VPadVabstractat this point (in a text, maybe construable as a "time")
    • VPibe here
    • VPpostadVin this place
  • PERIOD
    • VPadSDuring that period, at that historical stageCH