shǒuxiān gàosu nǐ kāishǐ le jiē xiàlái gàosu nǐ huàn bùfen le zuìhòu gàosu nǐ kuài jiéshù le

“首先”告诉你开始了，“接下来”告诉你换部分了，“最后”告诉你快结束了。

'First' tells you it's started, 'next' tells you it's changing parts, 'last' tells you it's almost over.