Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: At a time when many countries around the world are clamouring to ease visa restrictions on big-spending Chinese tourists, the government of Hong Kong has begun looking at ways to limit their numbers.

Could Hong Kong limit mainland visitors?