public function create(array $contacts)
    {
        $url = sprintf('%s/webwxcreatechatroom?lang=zh_CN&r=%s', $this->vbot->config['server.uri.base'], time());

        $result = $this->vbot->http->json($url, [
            'MemberCount' => count($contacts),
            'MemberList'  => $this->makeMemberList($contacts),
            'Topic'       => '',
            'BaseRequest' => $this->vbot->config['server.baseRequest'],
        ], true);

        if ($result['BaseResponse']['Ret'] != 0) {
            return false;
        }

        return $this->add($result['ChatRoomName']);
    }