Applications from parents seeking residency to be with children already in New Zealand will be placed in the slow processing lane if their children-sponsors are not "high-income" people.
"Tier-one parents will be eligible regardless of what country their other adult children live in, while the criteria for tier-two parents will be tightened so that only those who had no adult children living in their home country will be eligible."
high-income 指多少钱?
children-sponsor 指女儿/儿子,还是女儿女婿/儿子儿媳?
tier-one 和tier two 又是什么概念?