Obviously the clock on the wall is opposite to the mirror. One day, the time the immigrant sees in the mirror is half past eight. Do you know when it is?

Method 1: Based on the imaging characteristics of the plane mirror, make the actual situation of the clock image in the plane mirror, (red arrow) as shown below, you can see that the actual time of the clock is 4:00. Method 2: Turn the test paper over, being careful not to turn it upside down. Look at the clock directly from the back of the test paper. The actual time is 4:00. Therefore choose C.