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Lu Ping'an, after becoming a Decree-level professional, acquired the ability to turn potential pollutants into actual Taboo items.
That was his "Investment" talent and "All Things Breathing Martial Arts" considering "Taboo items" as living entities or life forms, and investing in them.
In fact, the principle is quite simple; it's about treating these "living entities" as individuals, introducing them to Profession Modules provided by the Taboo Library, and guiding them through "Advancement into a profession" to become some kind of "professional".
"... or to put it another way, to me, Taboo items are like magnets, potential pollutants are like embryos with the potential to be magnetized, and 'Professions' are the specific magnetic properties written into them, uh, or perhaps, a metaphor similar to a cassette tape might be more understandable. In that case, these junk Taboo items can also be regarded as old cassette tapes that can be rewritten..."