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Jyutping soeng5 so1
Pinyin shàng shū

Definitions (Wiktionary)
  1. verb, historical
    to submit a report to the emperor; to submit a memorial to the throne
  2. noun, historical
    report to the emperor; memorial to the throne
    (syn.) 奏疏, 奏章

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Jyutping soeng6 so3
Pinyin shàng shū

Definitions (CC-CEDICT)
  1. (of a court official) to present a memorial to the emperor (old)