What chapter does uncle's disappearance start from?

Volume 9-Homecoming Lost in the Sea-In Chapter 7 "Imprisonment" and Chapter 8 "Meeting", Wu Xie followed the mark of stuffy oil bottle, leaving his uncle injured on it. Then it disappeared until the stuffy oil bottle came out of the meteorite hole and Wu Xie and the fat man were rescued, that is, Wu Xie didn't go back and take his uncle away. At that time, he escaped, and his uncle disappeared before he could go back to find him.