Exhibit 99.1

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

Under our weighted voting rights structure, our share capital comprises Class A ordinary shares and Class C ordinary shares. Each Class A ordinary share entitles the holder to exercise one vote, and each Class C ordinary share entitles the holder to exercise eight votes, respectively, on any resolution tabled at our general meetings, except as may otherwise be required by law or by the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited or provided for in our memorandum and articles of association. Shareholders and prospective investors should be aware of the potential risks of investing in a company with a weighted voting rights structure. Our American depositary shares, each representing one of our Class A ordinary shares, are listed on the New York Stock Exchange in the United States under the symbol NIO.

NIO Inc.

(A company controlled through weighted voting rights and incorporated in the Cayman Islands with limited liability)

(Stock Code: 9866)

DATE OF BOARD MEETING

The board of directors (“Board”) of NIO Inc. (the “Company”) will hold a Board meeting on Tuesday, March 5, 2024 (Beijing/Hong Kong/Singapore Time) for the purposes of, among other things, approving the Company’s unaudited financial results for the three months and full year ended December 31, 2023 (“Q4 and FY2023 Results”). The Company will publish its Q4 and FY2023 Results on Tuesday, March 5, 2024 (Beijing/Hong Kong/Singapore Time) on the website of The Stock Exchange of Hong Kong Limited at www.hkexnews.hk and the Company’s website at ir.nio.com.

The Company’s management will host an earnings conference call at 8:00 p.m. Beijing/Hong Kong/Singapore Time on March 5, 2024 (7:00 a.m. U.S. Eastern Time on March 5, 2024). A live and archived webcast of the conference call will be available on the Company’s investor relations website at https://ir.nio.com/news-events/events.

For participants who wish to join the conference using dial-in numbers, please register in advance using the link provided below and dial in 10 minutes prior to the call. Dial-in numbers, passcode and unique access PIN would be provided upon registering.

https://s1.c-conf.com/diamondpass/10037213-hg876t.html

Hong Kong, February 22, 2024

As of the date of this announcement, the board of directors of the Company comprises Mr. Bin Li as the chairman, Mr. Lihong Qin, Mr. Eddy Georges Skaf and Mr. Nicholas Paul Collins as the directors, and Mr. Hai Wu, Mr. Denny Ting Bun Lee, Ms. Yu Long and Mr. Yonggang Wen as the independent directors.