question:
2jquery-1.11.0.min.js:4 OPTIONS http://202.115.195.241:8068/Service1.svc/hello1 405 (Method Not Allowed)
http://202.115.195.241:8068/Service1.svc/hello1: Response for preflight has invalid HTTP status code 405.

1. WCF code and WebConfig configuration:

 [ServiceContract]
    public interface IService1
    {
         [OperationContract, WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, UriTemplate = "hello/{nie}")]
        string DoWork(string nie);

        [OperationContract, WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, UriTemplate = "hello1")]
        string DoWork1();
    }
    
 //
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class Service1 : IService1
    {
        public string DoWork(string nie)
        {
            return jss.Serialize("hello" + nie);
        }

        public string DoWork1()
        {

            return jss.Serialize("hello");
        }
    }
    
// Webconfig
<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <!---->
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        <!--Content-Type,-->
        <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept" />
        <add name="Access-Control-Allow-Methods" value="GET,POST,PUT, DELETE, OPTIONS" />
      </customHeaders>
    </httpProtocol>
    <security>
      <requestFiltering>
        <requestLimits maxQueryString="2147483640" maxUrl="2097151" maxAllowedContentLength="2097151"/>
      </requestFiltering>
    </security>
  </system.webServer>
  
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>
  <system.serviceModel>
    <behaviors>
      <endpointBehaviors>
        <behavior name="webHttp">
          <webHttp helpEnabled="true"/>
        </behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior name="MapConfigBehavior">
          <!--  false  -->
          <serviceMetadata httpGetEnabled="true"/>
          <!--  true false  -->
          <serviceDebug includeExceptionDetailInFaults="true"/>
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <bindings>
      <webHttpBinding>
        <binding name="webHttpBindConfig" receiveTimeout="00:30:00" sendTimeout="00:30:00" maxReceivedMessageSize="104857600">
          <readerQuotas maxStringContentLength="2147483647" maxArrayLength="2147483647"/>
          <security mode="None"></security>
        </binding>
      </webHttpBinding>
    </bindings>
    <services>
      <service name="WCF_POST.Service1" behaviorConfiguration="MapConfigBehavior">
        <endpoint address="" binding="webHttpBinding" contract="WCF_POST.IService1" bindingConfiguration="webHttpBindConfig" behaviorConfiguration="webHttp"/>
      </service>
    </services>
  </system.serviceModel>
</configuration>

JQ access WCF code:

 function bb() {
    $.ajax
    ({
        type: "POST",
        url: "http://xxx/Service1.svc/hello",
        contentType: "application/json",                 
        data: "{"nie":"aa"}",
        timeout: 10000,
        dataType: "json",
        success: function (response) {
            alert(response)
        },
        error: function (xhr, ajaxOptions, thrownError) {
            alert(xhr.statusText);
            alert(thrownError);
            
        }
    });
 }
   
$.ajax
                ({
                    type: "POST",
                    url: "http://XXX/Service1.svc/hello",
                    contentType: "application/json",
                    data: JSON.stringify({ "nie": "aa"}), 
                    timeout: 10000,
                    dataType: "json",
                    success: function (response) {
                        alert(response)
                    },
                    error: function (xhr, ajaxOptions, thrownError) {
                        alert(xhr.statusText);
                        alert(thrownError);
                    }
                });