According to the Corporate Governance Code of the Hong Kong Listing Rules, what must issuers disclose about whistleblowing policies?

ID : 1881
Long answer : Issuers must disclose the existence and operation of whistleblowing policies. (Source: https://en-rules.hkex.com.hk/sites/default/files/net_file_store/HKEX4476_3828_VER36626.pdf)
Short answer : The existence and operation of such policies.
answer 2 : Only employee complaints.
answer 3 : Only customer feedback.
answer 4 : Only supplier grievances.