A fixed package solves a real problem: predictability. But it does so by standardizing the route and flattening differences between travelers. In China, that often produces a trip that is administratively clear but emotionally generic.
A bespoke itinerary makes different decisions. It asks what kind of China this traveler wants to encounter, how much movement they can absorb, which contrasts will be most revealing, and what sequence will let the country accumulate meaning rather than just impressions.