Why is the time zone in my JavaScript console incorrect?

Question

I am in the 'Asia/Shanghai' time zone and have set my computer system's time zone accordingly. However, when I retrieve the time zone using Chrome's console, the returned result is 'America/Chicago'.

Intl.DateTimeFormat().resolvedOptions().timeZone
'America/Chicago'

When I use Date(), I obtain the time in the correct time zone, and the obtained time zone offset through the function (new Date().getTimezoneOffset()) is -480, which is also correct.

new Date()
Fri Oct 13 2023 10:24:20 GMT+0800    <--Asia/Shanghai

new Date().getTimezoneOffset()
-480     <--Asia/Shanghai

Now my question is ,Why does Intl.DateTimeFormat().resolvedOptions().timeZone not match the time zone obtained from Date()?

How can I fix the issue with Intl.DateTimeFormat().resolvedOptions().timeZone returning the wrong time zone?

I tried on other computers, and the results were normal.