According to the Model Code for Securities Transactions by Directors of Listed Issuers in Hong Kong Listing Rules, what must a director do before buying/selling securities?

ID : 1892

Long answer : Directors must notify the chairman or a designated director and obtain written acknowledgment before trading. (Source: https://en-rules.hkex.com.hk/sites/default/files/net_file_store/HKEX4476_3785_VER31169.pdf)

Short answer : Notify the chairman or a designated director in writing and obtain acknowledgment.

answer 2 : Seek approval from shareholders.

answer 3 : File a report after trading.

answer 4 : No action required.