If you were alone on an island,what would you do in order to survive?

如果你孤身一人在一荒岛之上，为了生存你会做什么

如果你一个人在一个孤岛上，你会怎么做让自己生存？

draw a large "SOS" on the sand, and waiting for rescue.

坐船回去
go back home by boat

i would seek for the tool to meet the basic survival needs ,then searching for communication with outside and the road which goes home .