That spurred on North Korea, who as the world No.7 are ranked 11 places above New Zealand.
They began to gain the upper hand with some crisp passing and movement and levelled in the 21st minute when Wi met a whipped cross from the right.
The midfielder almost put her side ahead minutes later but dragged her snap shot just wide.
While North Korea continued to be more dominant in a hard-fought and at times physical encounter, both sides created chances in the second spell.
One feature of the Football Ferns' play was their insistence on passing the ball out from the back, even when their opponents were pressing high. "We just want to be get as good as we can at taking the pressure," Readings said.
"If we decided to play a bit direct and long, then I think that's not staying true to who were are. At the same time, we are going to learn some massive lessons."
The series continues with North Korea facing Australia at the same venue tomorrow afternoon at 3.30 - entry is free - and concludes with the Football Ferns meeting the Matildas on Thursday night.