{{Short description|Code scanned to record entry to a location}} {{Use dmy dates|date=November 2023}} {{hatnote|Not to be confused with Health Code, which is the app to show the QR code of the COVID-19 status of a specific person.}} thumb|The check-in code used in Doncaster, Victoria, Australia thumb|The venue code used in Suzhou, Jiangsu, China thumb|The venue code (left) and digital sentry (right) used in Shanghai, China
The '''check-in code''' or the '''venue code''' ({{lang-zh|{{linktext|场所|码}}}}, ''Chǎngsuǒgmǎ'') is a QR code to record check-in locations for contact tracing and epidemiologic investigations. It was widely used in Australia and China during the COVID-19 pandemic in 2020–2022.
== Mechanism == Because of the COVID-19 pandemic, some regulations were made for contact tracing, and then some governments required people to scan a QR code to record their locations of all the places that they have visited.<ref>{{cite web|url=https://www.vic.gov.au/new-qr-code-check-history-you-control-your-data|title=New QR Code check-in history – you control your data|website=Victorian Government|date=2021-08-12|url-status=live|archive-date=2022-03-10|archive-url=https://web.archive.org/web/20220310202309/https://www.vic.gov.au/new-qr-code-check-history-you-control-your-data}}</ref><ref>{{cite web|url=https://www.dailyadvertiser.com.au/story/7073771/video-still-confused-how-to-use-the-service-nsw-qr-codes/|title=Wagga Covid: How to check in using the Service NSW QR code|website=The Daily Advertiser|date=2021-01-06|url-status=live|archive-date=2023-07-10|archive-url=https://web.archive.org/web/20230710133213/https://www.dailyadvertiser.com.au/story/7073771/video-still-confused-how-to-use-the-service-nsw-qr-codes/}}</ref><ref>{{cite web|url=http://www.sz.gov.cn/en_szgov/news/latest/content/post_9602179.html|title=Alternative solution for venue code|website=Shenzhen Government Online|date=2022-03-04|url-status=live|archive-date=2023-07-10|archive-url=https://archive.today/20230710133908/http://www.sz.gov.cn/en_szgov/news/latest/content/post_9602179.html}}</ref> As for the example of the Suzhou venue code, the QR code was generated via WeChat by the asset owner or the landlord, and then the location and the person would be recorded when the QR code scanner scanned this QR code.<ref>{{cite web|title=苏州市疫情防控2022年第116号通告（"场所码"实施指南） - 全力做好疫情防控工作 |url=https://www.suzhou.gov.cn/dyyqzjz/sjz/202204/6867c7c13e504f259f90428621df8a37.shtml |website=苏州市人民政府|language=zh-hans|access-date=2022-06-22 |url-status=live|archive-date=2022-06-25 |archive-url=https://web.archive.org/web/20220625011647/https://www.suzhou.gov.cn/dyyqzjz/sjz/202204/6867c7c13e504f259f90428621df8a37.shtml}}</ref>
== Purposes == As all the people scan the QR code when they visit specific locations, their locations and their personal information are recorded. If one of them is infected with COVID-19, people who have visit the same location will be warned, which is convenient for epidemiologic investigations.<ref>{{cite web|title="场所码"是什么"码"？一分钟告诉你|url=http://ah.news.cn/2022-04/08/c_1128540827.htm|access-date=2022-05-27|website=新华网|language=zh-hans|url-status=live|archive-date=2022-04-08|archive-url=https://web.archive.org/web/20220408043709/http://ah.news.cn/2022-04/08/c_1128540827.htm}}</ref><ref>{{cite web|title=场所码是什么码？江苏各市场所码申领指南|url=http://www.xhby.net/js/sh/202204/t20220405_7491441.shtml|access-date=2022-05-27|website=新华报业网|language=zh-hans|url-status=live|archive-date=2023-07-10|archive-url=https://web.archive.org/web/20230710140407/http://www.xhby.net/js/sh/202204/t20220405_7491441.shtml}}</ref>
== See also == {{Commons category|Check-in QR codes|check-in QR codes}} * Health Code * Hong Kong Health Code
== References == {{Reflist}}
Category:Software associated with the COVID-19 pandemic Category:COVID-19 contact tracing apps Category:Barcodes