YoumaythinkwhatyousayonWeChatisyourownbusiness，butobviouslytheCanadianauthoritiesdon'tagree．Lastweek，aChinesestudentwassentbacktoChinaattheCanadiancustomsbecauseofficersidentifiedsomedirtyexpressionsinagrou

　　You may think what you say on WeChat is your own business，but obviously the Canadian authorities don't agree．Last week，a Chinese student was sent back to China at the Canadian customs because officers identified some dirty expressions in a group chat on his WeChat account．His visa was also denied by the Canada Border Service Agency （CBSA） after the discovery．

　　Sometimes travelers are stopped for having done something that arouses the suspicion of authorities，but this student probably just happened to be one of those who were examined at random by the customs．The CBSA website clearly says，"At any point when you are going through the customs，you may be brought to our Secondary Services and Inspections area．"While you're in the area，your purse or wallet，electronics （including laptops and cell phones） will be put under careful check．

　　Now，you need to be fully aware of the items you're not allowed to bring before you travel abroad．The website of UK Visas and Immigration lists pirated copies（盗版） of movies and music as illegal．If you're caught bringing pirated products into the UK，these products will be taken away as a punishment，and you may be accused．

　　Besides pirated copies，you should also be careful about food，animals and plants．You may have heard the news last April about how Hollywood film star Johnny Depp's wife，Amber Heard，was facing lawsuits for taking her two dogs into Australia without declaring them to customs officials．According to Australia's Department of Immigration and Border Protection，Australia has strict laws concerning the importation of animals．Animals from overseas could bring diseases and pests into the country and do damage to the vulnerable local environment．

　　There is a limit of cash you can bring when traveling abroad．According to UK Visas and Immigration，for example，the maximum amount of cash you can bring into the country is€10，000 （72，000RMB）．You'll have to declare it if you're bringing more．