Cover - shares	6 Months Ended
	Jun. 30, 2025	Aug. 14, 2025
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2025
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2025
Current Fiscal Year End Date	--12-31
Entity File Number	000-56590
Entity Registrant Name	TANCHENG GROUP CO., LTD.
Entity Central Index Key	0001753391
Entity Tax Identification Number	38-4086827
Entity Incorporation, State or Country Code	NV
Entity Address, Address Line One	7th Floor, Jincheng International
Entity Address, Address Line Two	Jiujinci Road, Wanbailin District
Entity Address, Address Line Three	Taiyuan City
Entity Address, City or Town	Shanxi Province
Entity Address, Country	CN
Entity Address, Postal Zip Code	030500
Country Region	86
City Area Code	139
Local Phone Number	1097-2765
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		4,381,550