According to the Model Code for Securities Transactions by Directors of Listed Issuers in Hong Kong Listing Rules, what common transactions are exempt from trading restrictions during blackout period?

Long answer : Exempt transactions include accepting rights issues or exercising options granted before blackout periods. (Source: https://en-rules.hkex.com.hk/sites/default/files/net_file_store/HKEX4476_3785_VER31169.pdf)