No need for further explanation; the second stop is of course a direct flight to Nine Yin Mountain. However, since they've already come this far from Mars, it's effortless for the Primordial Spirit to travel, so Tie Dan is in no hurry. He simply follows the Chidao, crossing over from Sizhou, taking the opportunity to look for suitable Dao Bodies along the way for Huangfu Yi's reincarnation.
Logically speaking, finding a physical body isn't difficult at all. After all, the Mystical Sect's Soldier Dissolution Skill is indeed magical and fantastical. It doesn't necessarily require reincarnating into the fetus of a wealthy family perfectly aligned with the Five Luminaries and Nine Qi Return to One as their destined Dao Seed.
