He was welcomed at the Jackson's airport by jubilant supporters at lunch time today.
Kua said he was retained this time around with the biggest margin, which was not on cash politics.
He said people believed in his service delivery, which reflected in him receiving the biggest vote from his district.
He polled a total of 21,114 to retain his seat.
"We need to play cash free politics. If they (people) see services, they will retain you. This was the biggest lesson learnt from Sinesine-Yongumugl," Kua said.
The PNG National Party leader said people did not vote using the tribe mentality.
"Now people of Sinasina-Yongumugl are united and we call ourselves USSY. United Sinasina-Yongumugl," Kua added.