Company: YDDL
Filing Date: 2025-10-10
Form Type: 6-K
Source: 0001213900-25-098145
Chunk: 1

Company: One & one Green Technologies. INC
Filing Date: 2025-10-10
Form: 6-K
Chunk 1
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IPO.

In connection with the IPO, the Company issued
a press release on October 9, 2025, announcing the pricing of the IPO and a press release on October 10, 2025, announcing the closing
of the IPO, respectively. Copies of each press release are attached hereto as Exhibit 99.1 and Exhibit 99.2 and are incorporated by reference
herein.

This report does not constitute an offer to sell,
or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such offer,
solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or jurisdiction.

<div align='center'>EXHIBITS INDEX</div>

| Exhibit 
 No.     |     | Description            |
| 1.1     |     | Underwriting Agreement |
| 99.1    |     | Pricing Press Release  |
| 99.2    |     | Closing Press Release  |

<div align='center'>1

SIGNATURES</div>

Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| Date: October 10, 2025 | One and one Green Technologies. INC |                                                          |
|:-----------------------|:------------------------------------|:---------------------------------------------------------|
|                        | By:                                 | /s/ Caifen Yan                                           |
|                        | Name:                               | Caifen Yan                                               |
|                        | Title:                              | Chief Executive Officer, Chair of the Board and Director |

<div align='center'>2</div>