As Misha said, Donglu Country is now in jeopardy. If they can't stop Feng Cang's advance, perhaps in the near future, all the glory and wealth she has amassed will vanish like smoke, and she will fall from her high position as Empress Dowager to become a prisoner or even be executed.
At this point, Penglai Island's help is crucial. Du Yi once said that Misha was the head disciple of Penglai Island and only with his token would the island extend assistance. So now, if Misha could write a letter back, perhaps Donglu Country could still be saved.
