Analysis:

A sluggish loan refers to a loan that has passed the final repayment period, but has not had time to fully accrue bad debts.

Bad debts are overdue loans and can be fully accrued. According to financial regulations, those overdue for more than three years can be treated as non-performing loans.

These two concepts are mainly the differences in financial accounting. The former is reflected as an asset in the account, and the latter is fully accrued for bad debts, so it is not reflected as an asset in accounting (or the asset is already zero).

But from the legal point of view, it will all be due and unfulfilled creditor's rights, and there is no substantive difference.