Organization and basis of accounting (Details) - USD ($)	1 Months Ended
	Nov. 19, 2019	May 31, 2018	Oct. 21, 2009	Jul. 22, 2009	Dec. 31, 2019	Dec. 31, 2018
Organization and basis of accounting (Textual)
Stock split, description			The Company increased its authorized number of common stock from 50,000,000 to 190,000,000, and conducted a 2-for-5 reverse stock split (the "Reverse Stock Split") of the issued and outstanding common stock. After the Reverse Stock Split, the Company's issued and outstanding shares changed from 50,000,000 to 20,000,000 with par value of $0.001 effective on October 21, 2009.	Shentang International conducted a 1-to-10 stock split (the “Stock Split”) of the issued and outstanding common stock, so the Company’s issued and outstanding shares increased from 1,670,000 to 16,700,000 with par value of $0.001.
Outstanding shares				12,000,000
New shares issued				33,300,000
Issued common stock					20,000,000	47,000,000
Outstanding common stock					20,000,000	47,000,000
Par value					$ 0.001	$ 0.001
Value of common stock for services		$ 27,000
Settlement of related party loan		19,500
Promissory note amount		$ 7,500
David Lazar [Member]
Organization and basis of accounting (Textual)
Redemption of common stock	27,000,000
Value of common stock for services	$ 1,400,000
Promissory note amount	$ 19,169
Promissory note, description	The company elected to cancel and return to the shareholder the promissory note dated May 31, 2018 in the amount of $7,500 including interest.
Share Exchange [Member]
Organization and basis of accounting (Textual)
Issued common stock				50,000,000
Outstanding common stock				50,000,000
Par value				$ 0.001