docs: public static Media add_news(String access_token,List<Article> articles){
  		String str = JsonUtil.toJSONString(articles);
  		String messageJson = "{\"articles\":"+str+"}";
  		HttpUriRequest httpUriRequest = RequestBuilder.post()
  										.setHeader(jsonHeader)
  										.setUri(BASE_URI+"/cgi-bin/material/add_news")
  										.addParameter(PARAM_ACCESS_TOKEN, API.accessToken(access_token))
  										.setEntity(new StringEntity(messageJson,Charset.forName("utf-8")))
  										.build();
  		return LocalHttpClient.executeJsonResult(httpUriRequest,Media.class);
  	}