zhè / tào / jì / niàn / yóu / piào / shì / wèi / le / qìng / zhù / jiàn / guó / zhōu / nián / fā / xíng / de

这套纪念邮票是为了庆祝建国周年发行的。

This set of commemorative postage stamps was issued to celebrate the anniversary of the country's founding.