网站页面应该显示以下信息:"本页面正在建设中.请尽快检查". 构建HTML代码来显示消息.
Here is a simple HTML code that displays the message "This page is under construction. Please check back soon." on a website:

```html
<!DOCTYPE html>
<html>
<head>
    <title>Under Construction</title>
</head>
<body>
    <h1>This page is under construction. Please check back soon.</h1>
</body>
</html>
```