On the first anniversary of her arrest in Canada, Meng Wanzhou, the chief financial officer of the Chinese telecom giant Huawei, issued an open letter describing how she experienced fear, pain, disappointment, helplessness, torment and acceptance of the unknown.

She wrote at length about the support she received from her colleagues, about friendly people at a courthouse in Vancouver and about “numerous” Chinese online users who expressed their trust.

Her letter, posted on Monday, was not well received on the Chinese internet, where Ms. Meng is known — in a term meant to be endearing — as “princess” because she is a daughter of Huawei’s founder, Ren Zhengfei.

On the Twitter-like social media platform Weibo, many users posted the numbers 985, 996, 251 and 404 in the comment section below her letter. They were slyly referring to a former Huawei employee who graduated from one of the country’s top universities in a program code-named 985, worked from 9 a.m. to 9 p.m. six days a week and was jailed for 251 days after he demanded severance pay when his contract wasn’t renewed.