Ivanka Trump's second self-help book has been in the works since a year before her father won the presidency, but on Thursday, she canceled the promotional tour, citing ethics rules.

"In light of government ethics rules, I want to be clear that this book is a personal project," Trump wrote Thursday in a Facebook post. "I wrote it at a different time in my life, from the perspective of an executive and an entrepreneur, and the manuscript was completed before the election last November."

"Out of an abundance of caution and to avoid the appearance of using my official role to promote the book, I will not publicize the book through a promotional tour or media appearances," she said.

Trump had planned to spend this spring promoting "Women Who Work," after it's release in May.

The first daughter announced that she has established the Ivanka M. Trump Charitable Fund to grant the unpaid portion of her book advance as well as royalties to charities "that support the economic empowerment of women and girls."

The first round of $100,000 grants will be given to The National Urban League and Boys & Girls Clubs of America.

Trump, an unpaid adviser to the president, has faced backlash for her possible conflicts of interests related to her role in the White House and her eponymous fashion line.

Earlier this week, an Associated Press report found China gave Trump's company monopoly rights to sell the brand's jewelry, bags and spa services on the same day she had dinner with Chinese President Xi Jinping at Mar-a-Lago.