Access denied

While I test bing search api, it shows access denied, but it have been worked perfectly for the past few days.

curl --header "Ocp-Apim-Subscription-Key: xxxxxxxxx" "https://api.bing.microsoft.com/v7.0/custom/search?q=%E5%B0%8F%E7%B1%B3su70&customconfig=xxxxxxxxxxxxxxxxxxx&mkt=zh-CN"
Call

and the API Response shows:

{
  "error": {
    "code": "401",
    "message": "Access denied due to invalid subscription key or wrong API endpoint. Make sure to provide a valid key for an active subscription and use a correct regional API endpoint for your resource."
  }
}

my suscription id is in active status, I don't know how to solve this issue, please help me.