VANCOUVER, British Columbia — Since Dec. 1, Meng Wanzhou, a top executive of the Chinese technology firm Huawei and a daughter of the company’s founder, has been detained in Vancouver at the behest of American authorities, prompting a diplomatic tussle between China and the United States.

On Monday, Ms. Meng’s lawyers fought for her to be granted bail while she awaits a decision on whether she will be extradited to the United States. The judge, Justice William Ehrcke, is expected to rule on the bail request on Tuesday.

At the bail hearing at British Columbia’s Supreme Court on Monday, Ms. Meng’s lawyers pulled out all the stops to free their client. They brought in executives of two security companies to testify about how they would monitor Ms. Meng if she were to be released. The lawyers said Ms. Meng, 46, would pay the fees for both security companies, submit to physical and electronic monitoring, and give two Vancouver homes and a cash payment to secure bail. The cash and homes would total roughly $15 million in value.

“Given her unique profile as the face of a Chinese corporate national champion, if she were to flee or breach your order in any way in these very unique circumstances, my lord, it does not overstate to say she would embarrass China itself,” one of her lawyers, David Martin, told the judge.