London (CNN Business) Huawei's finance chief, detained in Canada since December, has written to the company's 188,000 employees to thank them for support she says has filled her "with power."

"Every time a court hearing has finished, I have seen Huawei employees staying up all night just to follow my case in distant time zones," Meng wrote in a letter that was published Monday on the company's internal online forum. "This has brought me to tears."

A translated version of the letter was provided to CNN Business by the company.

The case against Meng was filed amid a broader campaign against the Chinese tech company by the US government, which claims Huawei's networking equipment poses a national security threat.

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