if (config.qn_access && config.qn_access.secretKey !== 'your secret key') {
                        // 7牛
                        topicImage.image_fixed = result.url + config.qn_access.style[3];
                        topicImage.image_430 = result.url + config.qn_access.style[1];
                        topicImage.image_86 = result.url + config.qn_access.style[0];