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CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY - Condensed balance sheets (Parenthetical) (Details) - $ / shares	Dec. 31, 2025	Dec. 29, 2025	Jan. 07, 2025	Dec. 31, 2024
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Ordinary shares, par value		$ 0.00005	$ 0.00005
Preference shares, par value			$ 0.00005
Class A ordinary shares
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Ordinary shares, par value	$ 0.00005			$ 0.00005
Ordinary shares, shares authorized	38,399,870,000			1,599,935,000
Ordinary shares, shares issued	1,867,853,490			1,595,399,890
Ordinary shares, outstanding	1,867,853,490			1,595,399,890
Preference shares, par value		$ 0.00005
Class A ordinary shares \| Parent Company
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Ordinary shares, par value	$ 0.00005			$ 0.00005
Ordinary shares, shares authorized	38,399,870,000			1,599,935,000
Ordinary shares, shares issued	1,867,853,490			1,595,399,890
Ordinary shares, outstanding	1,867,853,490			1,595,399,890
Class B ordinary shares
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Ordinary shares, par value	$ 0.00005			$ 0.00005
Ordinary shares, shares authorized	400,000,000	400,000,000		400,000,000
Ordinary shares, shares issued	99			99
Ordinary shares, outstanding	99			99
Class B ordinary shares \| Parent Company
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Ordinary shares, par value	$ 0.00005			$ 0.00005
Ordinary shares, shares authorized	400,000,000			400,000,000
Ordinary shares, shares issued	99			99
Ordinary shares, outstanding	99			99
Class A preference shares
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Preference shares, par value	$ 0.00005			$ 0.00005
Preference shares, shares authorized	65,000	65,000	65,000	65,000
Preference shares, shares issued	65,000			65,000
Preference shares, shares outstanding	65,000			65,000
Class A preference shares \| Parent Company
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Preference shares, par value	$ 0.00005			$ 0.00005
Preference shares, shares authorized	65,000			65,000
Preference shares, shares issued	65,000			65,000
Preference shares, shares outstanding	65,000			65,000
Class A II preference shares
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Preference shares, par value	$ 0.00005			$ 0.00005
Preference shares, shares authorized	65,000	65,000		0
Preference shares, shares issued	65,000			0
Preference shares, shares outstanding	65,000			0
Class A II preference shares \| Parent Company
CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY
Preference shares, par value	$ 0.00005			$ 0.00005
Preference shares, shares authorized	65,000			0
Preference shares, shares issued	65,000			0
Preference shares, shares outstanding	65,000			0