The DOCTYPE is a required preamble for HTML5 websites.
These websites are related to hkqr.gov.hk in terms of content, traffic and structure
hkcaavq.edu.hk
hkqf.gov.hk
hkma.org.cn
ttigroup.com
speed-polyu.edu.hk
swrb.org.hk
britishunited.net
scope.edu