Will I be allowed to enter HK on 18th December 2018 with a NZ passport which expires on 31st January

My wife holds tickets for travel from Sydney Australia to HK on QF127 on 18th December 2018 and depart HK for return to Sydney on 3rd January 2019 on QF128. She holds a NZ passport which expires on 31st January 2019. She will stay with our daughter in HK. Will she gain entry to HK and be allowed to stay until the intended departure on January 3rd 2019?