Prepayment and Other Current Assets, Net - Schedule of Prepayments and Other Current Assets (Details) ¥ in Thousands, $ in Thousands	Jun. 30, 2026 USD ($)	Jun. 30, 2026 CNY (¥)	Dec. 31, 2025 CNY (¥)
Schedule of Prepayments and Other Current Assets [Abstract]
Procurement advance		¥ 168,240	¥ 165,270
Nonemployee share-based payments		268,668
Others		11	109
Less: provisions for prepayment and other current assets		(165,270)
Total prepayment and other current assets, net	$ 40,036	¥ 271,649	¥ 165,379

The amount of nonemployee share-based payments.

No definition available.

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Balance Type:	debit
Period Type:	instant

- Definition

Procurement advance.

+ References

No definition available.

+ Details

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Namespace Prefix:	tc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represent the amount of provisions for prepayment and other current assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	tc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(7))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 340
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483032/340-10-45-1

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration