This level of the work centers upon a fundamental idea: the sequence of constellations up to and through the door to the universe. This is truly heady stuff and worth the effort to reach. Further details are available for those who complete the earlier stages of Neidan Yoga (refer to the levels detailed on this website).
As a hint: the road leads to the general vicinity of Taurus. From here, one jumps OUT of this universe altogether into a tapestry of other universes—each one as rich and potent as the one you presently inhabit. For instance, in the Hindu religion, the nakshatra, Rohini (located smack in the center of Taurus), is taken as the abode of Lord Krishna and a very high vibration place. So, in their thinking this is a very holy place. Further, in their mythology, the Moon (actually considered a male) has 27 wives (the 27 nakshatras) but of all these, Rohini is his favorite. And again, in Jyotish, the moon is exalted (at its best and supported the best) in Taurus.
There are many other clues and hints like this but you get the idea. The red giant stars Aldebaran (in Taurus) and Betelgeuse (just a little lower in the night sky in Orion) stand as markers for this neck of the celestial woods and as guardians for the Divine Mother’s summer home in this universe (she lives a little further up the spiritual ladder and well beyond this universe).