Exhibit 99.1

XINYUAN REAL ESTATE CO., LTD. (the “Company”)

鑫苑地产控股有限公司

UNANIMOUS WRITTEN RESOLUTION OF THE BOARD OF DIRECTORS OF THE

COMPANY MADE ON September 3, 2025

董事会2025年 9 月 3日书面一致决议

The undersigned, being the directors (collectively, “Directors”, each a “Director”) of board of Directors (“Board”) of the Company acting by written resolutions without a meeting DO HEREBY CONSENT to the adoption of the following resolutions.

董事以书面一致决议的形式批准下列决议。

IT IS NOTED that in light of the confidence in the Company’s long-term intrinsic value, the Board of Directors has reviewed and approved the continuation of the Company’s share repurchase program to further enhance shareholder returns.

鉴于对公司长期价值的信心，经公司董事会审议，公司计划继续开展股票回购计划，以更好的提升股东回报。

(Signature page to follow, 以下无正文，为签字页)

We, the undersigned, being the Directors, hereby consent to the passing of the foregoing resolution with effect from the date of these resolutions:

我们，以下签字人，作为董事，特此同意自这些决议之日起通过上述决议：

/s/ Yong ZHANG		/s/ Yuyan YANG
Yong ZHANG 张勇		Yuyan YANG 杨玉岩

/s/ Fei XIE		/s/ Haifei HE
Fei XIE 谢菲		Haifei HE 贺海飞

/s/ Yong CUI		/s/ Frank LI
Yong CUI 崔勇		Frank LI 李轶梵


Ji LUO 罗辑

Xinyuan Real Estate Co., Ltd. 6-K