书面许可 shū miàn xǔ kě

DEFINITIONS

  1. written permission
  2. written authorization

CHARACTERS

书 shū
HSK 1
book, letter, document; writings
面 miàn
HSK 1
face; surface; plane; side, dimension
许 xǔ
HSK 4
allow, permit; promise; betroth
可 kě
HSK 2
may, can, -able; possibly