On the first anniversary of her arrest, the Huawei technology executive Meng Wanzhou has written a reflective, sometimes plaintive letter describing her year in detention in Vancouver as having “moments of fear, pain, disappointment, helplessness, torment, and struggle” but also acceptance and more time for herself.

Ms. Meng, 47, a former secretary at Huawei who rose to become its chief financial officer and public face of the company, was arrested in Vancouver last December after the United States had requested her extradition on fraud charges.

She has been freed on bail but is not permitted to leave Vancouver. She is accused, among other things, of deceiving four banks to enable Huawei to evade American sanctions against Iran.

“Over the past year, I have also learned to face up to and accept my situation,” she wrote in the letter, which was published on Huawei’s website on Sunday. “I’m no longer afraid of the unknown.”