BI4OAE I'm just wondering if I need to re-apply for a Hong Kong license, or if it can also be used on mainland China.
BG6TA The callsign for Hong Kong can only be used in Hong Kong; it must be applied for separately in mainland China. Similarly, the callsign for mainland China cannot be used in Hong Kong, Macao, or Taiwan.
BI4JMS Viewing notifications serves as proof of operational competence, essentially verifying the issuance of an operation certificate.