protected function findModel($id)
    {
        $query = Fans::find()
            ->andWhere([
                'id' => $id,
                'wid' => $this->getWechat()->id
            ]);
        if (($model = $query->one()) !== null) {
            return $model;
        } else {
            throw new NotFoundHttpException('The requested page does not exist.');
        }
    }