bing vision search API param 'mkt': 'zh-CN' does not take effect

we meet issue when accessing bing vision search API.

When we call the bing vision search API, specifying the market by adding the parameter  {'mkt': 'zh-CN'} as mentioned in https://learn.microsoft.com/zh-cn/bing/search-apis/bing-visual-search/reference/query-parameters, but the searching result returned does not fit Chinese market. The returned links in "hostPageUrl" cannot be accessed due to China local policy.