xīn / xiào / zhǎng / jīn / tiān / zhèng / shì / zǒu / mǎ / shàng / rèn / kāi / shǐ / chǔ / lǐ / xué / xiào / shì / wù新校长今天正式走马上任,开始处理学校事务。The new principal officially took office today and began handling school affairs.