If it had been Doctor Manhattan, once he knew the location of that space, he could have teleported there directly through quantum properties. That would have seemed much more convenient.
Su Ming had not quantumized his body, so he could not do that.
But if it really had been that blue man, quantumization would also have stripped away all his emotions. He would never have taken part in an investigation. He would merely "discover" it, then ignore it without expression.
Everything had two sides. Where there were advantages, there were naturally disadvantages as well.
Use Quantum Concepts, but do not be consumed by quantum mechanics. The balance had to be maintained.
The sun shone brightly outside Hogwarts Castle, and a gentle breeze swept across the emerald-green grass. Scattered Little Flowers bowed their heads. Across the Black Lake, at the edge of the Forbidden Forest on the opposite shore, Neville was teaching a group of students. It was much the same as the lesson Deathstroke had taught him back then. He held a huge bug in his hand as he explained that once you removed the head, it could be eaten.
That made Su Ming smile, filling him with the satisfaction of seeing knowledge passed on.
Now that they knew where the Chamber of Secrets was, and knew that the straight line between two points was the shortest, Su Ming chose to dig down from directly above the chamber's main hall—in other words, to bore through from the ruins at the bottom of the Black Lake.
At the lakeshore, Hermione cast a simple Bubble-Head Charm and signaled that they could go underwater. She knew the Black Lake contained many annoying Murlocs, and that Hogwarts had some sort of agreement with them about non-aggression.
But she did not think those Murlocs had