from beginning to endadvadverb: Describes a verb, adjective, adverb, or clause--for example, "come quickly," "very rare," "happening now," "fall down."
(all the way through)
从头到尾 cóng tóu dào wěi
自始至终 zì shǐ zhì zhōng
I read the whole 400-page report from beginning to end.