Can two card personnel go to Hong Kong?

According to the Hong Kong Tourism Board, you can go.

1. You can enter Hong Kong visa-free and stay in Hong Kong for 7 days. The destination is Chinese mainland or Macau, and you don't need to show your joint ticket.

To travel to Hong Kong, you must apply for an entry permit. The embassy may issue an entry permit valid for 1 or twice within 3 months and each stay shall not exceed 14 days according to the specific circumstances of the applicant.