Article in English: It's a gray app that contains gears (⚙️) and is typically located on your home screen. It's in a section with other Apple apps, like Calendar and Notes. It's the first section of the menu. It's at the bottom of the "ACCOUNTS" section. It's in the middle of the list.  It's a blue button on the screen.  It's a blue button on the screen. If you've enabled two-step verification for Gmail, enter the verification code you received via text or using Authenticator. It will turn green. Select other Gmail data you want to sync with your iPhone by sliding the data you want to see on your iPhone to the "On" (green) position. It's in the upper-right corner of the screen. Now you can send and receive Gmail messages using the native iPhone Mail app.

Summary in Chinese:
打开“设置”。 向下滑动并点击邮件。 点击帐户。 点击添加帐户。 点击Google。 在指明的字段中输入你的Gmail地址。 点击下一步。 在指明的字段中输入你的密码。 点击下一步。 将“邮件”滑到“开”位置。 点击保存。