" but where is your daughter ? " asked the man . " she is married to the river - god , " was the reply . " all you need to do is to take along the letter lying there . when you reach the middle of the yellow river , beat against the side of the ship and call out : ' greencoat ! ' then some one will appear and take the letter from you . " and with these words he handed hu - wu - bau the letter , and he was taken back again to the upper world . when he came to the yellow river on his journey , he did what the lord of the great mountain had told him , and cried : " greencoat ! " and sure enough , a girl in green garments rose from the water , took him by the hand and told him to close his eyes . then she led him into the palace of the river - god and he delivered the letter . the river - god entertained him splendidly , and thanked him as best he knew how . at parting he said : " i am grateful that you have made this long journey to see me . i have nothing to give you , however , save this pair of green silk shoes . while you are wearing them you can keep on walking as long as you like and never grow weary . and they will give you the second sight , so that you will be able to see the spirits and gods . " 
he will go on a journey to deliver the letter .
what will happen when hu-wu-bau returns to the upper world ?
what will happen when hu-wu-bau returns to the upper world ?