为了测试PVA VPN的稳定性，按照以下步骤进行

注册和配置PVA VPN：

• 在网上购买适合的PVA VPN服务。
• 在官网或应用的登录页面注册账号。
• 访问PVA VPN的官方网站或应用的登录页面进行登录。

登录PVA VPN：

• 在PVA VPN的登录页面，输入注册邮箱和密码，完成账户登录。
• 点击注册并注册成功后,PVA VPN会发送一个登录链接。

访问PVA VPN的登录页面：

点击PVA VPN的登录页面链接进行登录。

连接IPython Kernel：

• 打开Jupyter Notebook或Python 3.6 及以上版本，安装IPython kernel。
• 打开Jupyter Notebook，输入以下代码：

  from IPython.core.display import HTML
  HTML('''<style>
  .container { max-width: 1px; }
  .content-container { max-width: 1px; }
  .card { max-width: 8px; }
  .card h2 { text-align: center; }
  .card p { text-align: center; }
  .card .field { margin: 1.5rem; }
  .card .btn { padding: 0.75rem 1rem; border-radius: 0.5rem; cursor: pointer; }
  .card .btn:hover { background-color: #fff; }
  .card .btn-primary { background-color: #7bff; color: white; }
  .card .btn-secondary { background-color: #56b3; color: white; }
  .card .btn-success { background-color: #7bff; color: black; }
  .card .btn-danger { background-color: #fff; color: black; }
  .card .btn-warning { background-color: #fff; color: white; }
  .card .btn-danger-primary { background-color: #56b3; color: white; }
  .card .btn-danger-secondary { background-color: #7bff; color: white; }
  .card .btn-info { background-color: #fff; color: black; }
  .card .btn-secondary-primary { background-color: #56b3; color: white; }
  .card .btn-secondary-secondary { background-color: #7bff; color: white; }
  .card .btn-secondary-success { background-color: #7bff; color: black; }
  .card .btn-primary-success { background-color: #56b3; color: white; }
  .card .btn-warning-success { background-color: #fff; color: black; }
  .card .btn-danger-success { background-color: #7bff; color: black; }
  .card .btn-warning-danger { background-color: #fff; color: white; }
  .card .btn-danger-primary-success { background-color: #56b3; color: white; }
  .card .btn-danger-secondary-success { background-color: #7bff; color: white; }
  .card .btn-info-success { background-color: #fff; color: black; }
  .card .btn-secondary-info { background-color: #56b3; color: white; }
  .card .btn-secondary-success-success { background-color: #7bff; color: white; }
  .card .btn-primary-success-success { background-color: #56b3; color: white; }
  .card .btn-warning-success-success { background-color: #fff; color: black; }
  .card .btn-danger-success-success { background-color: #7bff; color: black; }
  .card .btn-warning-danger-success { background-color: #fff; color: white; }
  .card .btn-danger-primary-success-success { background-color: #56b3; color: white; }
  .card .btn-danger-secondary-success-success { background-color: #7bff; color: white; }
  .card .btn-info-success-success { background-color: #fff; color: black; }
  .card .btn-secondary-info-success { background-color: #56b3; color: white; }
  .card .btn-secondary-success-success { background-color: #7bff; color: white; }
  .card .btn-primary-success-success { background-color: #56b3; color: white; }
  .card .btn-warning-success-success { background-color: #fff; color: black; }
  .card .btn-danger-success-success { background-color: #7bff; color: black; }
  .card .btn-warning-danger-success { background-color: #fff; color: white; }
  .card .btn-danger-primary-success-success { background-color: #56b3; color: white; }
  .card .btn-danger-secondary-success-success { background-color: #7bff; color: white; }
  .card .btn-info-success-success { background-color: #fff; color: black; }
  .card .btn-secondary-info-success-success { background-color: #56b3; color: white; }
  .card .btn-secondary-success-success { background-color: #7bff; color: white; }
  .card .btn-primary-success-success { background-color: #56b3; color: white; }
  .card .btn-warning-success-success { background-color: #fff; color: black; }
  .card .btn-danger-success-success { background-color: #7bff; color: black; }
  .card .btn-warning-danger { background-color: #fff; color: white; }
  .card .btn-danger-primary { background-color: #56b3; color: white; }
  .card .btn-danger-secondary { background-color: #7bff; color: white; }
  .card .btn-info { background-color: #fff; color: black; }
  .card .btn-secondary-info { background-color: #56b3; color: white; }
  .card .btn-secondary-success { background-color: #7bff; color: white; }
  .card .btn-primary-success { background-color: #56b3; color: white; }
  .card .btn-warning-success { background-color: #fff; color: black; }
  .card .btn-danger-success { background-color: #7bff; color: black; }
  .card .btn-warning-danger { background-color: #fff; color: white; }
  .card .btn-danger-primary-success { background-color: #56b3; color: white; }
  .card .btn-danger-secondary-success { background-color: #7bff; color: white; }
  .card .btn-info-success { background-color: #fff; color: black; }
  .card .btn-secondary-info { background-color: #56b3; color: white; }
  .card .btn-secondary-success-success { background-color: #7bff; color: white; }
  .card .btn-primary-success-success { background-color: #56b3; color: white; }
  .card .btn-warning-success-success { background-color: #fff; color: black; }
  .card .btn-danger-success-success { background-color: #7bff; color: black; }
  .card .btn-warning-danger { background-color: #fff; color: white; }
  .card .btn-danger-primary { background-color: #56b3; color: white; }
  .card .btn-danger-secondary { background-color: #7bff; color: white; }
  .card .btn-info { background-color: #fff; color: black; }
  .card .btn-secondary-info { background-color: #56b3; color: white; }
  .card .btn-secondary-success { background-color: #7bff; color: white; }
  .card .btn-primary-success { background-color: #56b3; color: white; }
  .card .btn-warning-success { background-color: #fff; color: black; }
  .card .btn-danger { background-color: #7bff; color: black; }
  .card .btn-warning-danger { background-color: #fff; color: white; }
  .card .btn-danger-primary { background-color: #56b3; color: white; }