What difficulty did both chinese and japanese immigrants face when trying to pass through immigration stations in the late 1800s and early 1900s?

The difficulty that both chinese and japanese immigrants face when they try to pass the immigration stations during that period is : Chinese and japanese immigrants were restricted by law from entering united states

This was known as the exclusion act. The main purpose of this policy was to protect the job opportunities from the united states citizen that being threaten by the availability of cheap immigrant workers

Where's the table ? can you take a pic ?