Website Tracking Script Installation: Adding i-Test Analytics

This code snippet is used to add a tracking script to a website. It initializes the '_ma' variable if it doesn't already exist, sets the account ID to '4018c2c4-8a99-4027-908b-8827ed5418f9', and loads the script from 'https://www.i-test.com.cn/download/collect.min.js' asynchronously. This script is likely used to track user behavior on the website, such as page views and click events, for analytics purposes.