翻译以下一段中文文本为英文：


在北京时间周一晚间13时39分，中国国家航天局相关负责人在此间表示，中国探测器天问一号已经在火星正式着陆，这也是我国首次实现这一目标。天问一号于去年7月23日发射升空，历时约7个月，飞行5.28亿公里，于5月15日开始进入环绕火星的极约400公里高轨道。
At 13:39 Beijing time on Monday evening, a spokesperson for the China National Space Administration announced that the Chinese probe Tianwen-1 had officially landed on Mars, marking the first successful Mars landing by China. Launched on July 23rd of last year, the probe traveled approximately 528 million kilometers over the course of seven months before entering into orbit around Mars on May 15th.