At the time New Zealand went into lockdown, on August 17, Yang was living in Remuera, Auckland.
On August 29 he booked a flight to Christchurch for September 1, where he arrived just before 9.30pm.
Between September 1 and 6, Yang travelled to Queenstown where he was residing and on September 7, the day before the South Island moved from level 3 to level 2, he attended the worksite and had a meeting on site with the project's architect.
Collin said the Ministry of Health was alerted to the possible breach on September 9 and police were notified.
They spoke to Yang at 6pm that day.
The Singaporean national was unable to provide any documentation relating to the purpose of his travel, nor an exemption document, and stated he had been "playing golf with a friend".
He had undergone a Covid-19 test and had received a negative result.
Yang told police he thought he could live and work in the same area and had made inquiries on the Covid-19 website.
He stated he drove from Christchurch to Queenstown on September 2 and, while he confirmed his employment was not an essential service, he stated "he didn't think the matter was particularly serious".
Walker told Judge Brandts-Giesen it was "simply an oversight and a mistake on behalf of Mr Yang".
At Auckland Airport he had provided a rates bill and letter from his employer and said it was a "misplaced assumption" he could travel to Queenstown.
"He accepts what he did was ... a breach of the rules and law. He is genuinely remorseful ... he's deeply apologetic for it."
Yang had admitted the offending — which Walker submitted was at the low end for offending of that nature — at the first reasonable opportunity since instructing counsel.
The defendant thought diversion might be appropriate, but police disagreed.
Judge Brandts-Giesen told Yang having been resident in New Zealand during the past two or three years the Covid-19 rules were "strict, and they have to be complied with".
He was fined $1000 and ordered to pay $130 court costs, both amounts to be paid by this Friday.
