Visitors who break the law during their stay will face a lifetime ban, he said.
Foreigners have to carry identity documents with them while traveling during the 72 hours, and their documents must be checked by police within 24 hours of their arrival in the city.
"These procedures are just in case of accidents," he said.
Members of the public can dial 5609-5400 or visit the station's website if they have any questions.
According to Gao Lijia, executive vice-president of Beijing Capital International Airport, the number of inbound passengers will rise sharply as a consequence of the policy.
Solar yacht put into use in SE China