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Expense by Nature - Summary of Sales and Marketing Expenses (Detail) - CNY (¥)
¥ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Sales and marketing expense      
Borrower acquisition expenses ¥ 7,865,407 ¥ 10,119,525 ¥ 11,506,402
General sales and marketing expenses 6,653,847 6,637,150 5,402,999
Investor acquisition and retention expenses 301,092 676,984 819,888
Referral expenses from platform service 936,570 559,413 84,268
Sales and marketing expenses ¥ 15,756,916 ¥ 17,993,072 ¥ 17,813,557