Taivo A Taiwan Mandarin dictionary

上行

shàngxíng

ㄕㄤˋ ㄒㄧㄥˊ

  1. 1(of trains) up (i.e. towards the capital)
  2. 2(of river boats) to go against the current
  3. 3to submit (a document) to higher authorities

Keep 上行 and it comes back until you know it.

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