This was a case of right heart, and any surgery on a right heart was more difficult than its normal counterpart, the left heart.
It was similar to the habitual decision-making of surgeons regarding anatomy, like an experienced driver used to a left-hand drive vehicle and driving on the left suddenly entering a country with the opposite rules, where the steering wheel is on the right and traffic keeps to the left. It's difficult to adapt immediately, especially in a highly complex traffic situation.
When the Fontan Surgery was performed, had it not been for Academician Wang's superb skills, the Fontan Surgery on a right heart would not have been so successful.
The dismantling surgery was not that simple, either; the operation had to be meticulous, preserving the quality and integrity of the "components" while dismantling. Reassembly and reconstruction still depended on these dismantled "components," not replacements.