Related party transactions - Summary Of Movement Of Allowance For Credit Losses On Amounts Due From Related Parties (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Schedule Of Due From Related Parties Allowance For Credit Losses [Abstract]
Beginning balance	¥ 846,266	¥ 858,618
Charge-offs	(1,967)	(2,736)
(Reversal)/Addition, net	1,575	(6,743)
Foreign currency exchange differences	11,337	(2,873)
Ending balance	¥ 857,211	¥ 846,266

Amount of allowance for credit loss on receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

No definition available.

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Name:	pt_DueFromRelatedPartiesAllowanceForCreditLosses
Namespace Prefix:	pt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of chargeoff of due from related parties, charged against allowance for credit loss.

+ References

No definition available.

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Name:	pt_DueFromRelatedPartiesAllowanceForCreditLossesChargeOffs
Namespace Prefix:	pt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Due from related parties allowance for credit losses foreign currency exchange differences.

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No definition available.

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Name:	pt_DueFromRelatedPartiesAllowanceForCreditLossesForeignCurrencyExchangeDifferences
Namespace Prefix:	pt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Due from related parties allowance for credit losses reversals.

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No definition available.

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Name:	pt_DueFromRelatedPartiesAllowanceForCreditLossesReversals
Namespace Prefix:	pt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Schedule Of Due From Related Parties Allowance For Credit Losses

+ References

No definition available.

+ Details

Name:	pt_ScheduleOfDueFromRelatedPartiesAllowanceForCreditLossesAbstract
Namespace Prefix:	pt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration