chapter 679 Everything has its limits, that's the ultimate secret!

"Good boy, you are as ruthless as your father! Okay, I promise you, if you save my brother, our Dragon King Palace will be named Chu from now on!" Liu Ruhui was not interested in the Dragon King Palace at all. Apart from her son, her younger brother was what she cared about most. If her brother is really cured, then as an older sister, she will be able to put most of her worries to rest! Huo Lin Dan, an extremely rare elixir! And the refining process is extremely complicated! It is difficult...