新西兰签证问题This visa expires 1 month after first arrival.stay su

新西兰签证问题
This visa expires 1 month after first arrival.stay subject to grant if entry permission.you must leave before visa expiry or face deportation.the holder shall not undertake employment in NZ.the holder shall not study for more than 3 months in every 12 month period in NZ.financial support evidence not required.return/onward ticket not required.the holder of this visa is sponsored
签证上写的这个.麻烦讲解下.还有请问这种签证在当地可以延签么?
NUMBER OF ENTIRES是 single