lore

The green bottle is powerful because it changes time, not because it wins fights

My favorite interpretation of the mysterious green bottle is that it changes the economics of cultivation. Faster herbs mean more pills, more experiments and more bargaining power, but only if Han Li learns alchemy and keeps the secret. It is closer to a private production system than a conventional superweapon. That also explains why quiet garden scenes can matter as much as battles. If another cautious cultivator found the bottle, would the result be similar, or is Han Li's patience the feature that turns it into a world-changing advantage?