Find session dir
You can find the corresponding path in this blog.
Can't find the Google Chrome User Data Directory in Mac OSX Lion
Mac path: /Users/domina/Library/Application Support/Google/Chrome/Default
Remember to copy this folder to a new temporary directory to avoid any interference with the login process.
Code part
ChromeOptions options = new ChromeOptions();
options.addArguments("--user-data-dir=/Users/user/Desktop/temp/Default");
WebDriver driver = new ChromeDriver(options);
driver.get("http://mg.world.qeeq.cn/order/order.php");
String userInput = ConsoleUtil.getUserInput("");
driver.quit();
When you use WebDriver for the first time to open a site, it may still require you to log in. I assume this is because some data does not match, but it doesn't matter. When you try to run your code for the second time, you will find that it doesn't need login.
Some refs
How to save the browser sessions in Selenium