The adverb of degree 过于
Adverbs of degree (程度副词) are used to intensify or modify the degree of an adjective or verb.
The adverb 过于 
is placed either before an adjective or a verb.
is placed either before an adjective or a verb.Examples
你最近过于努力了
You've been working too hard lately
nǐ zuìjìn guòyú nǔlì le
你过于信赖你的记忆力了
You're relying too much on your memory
nǐ guòyú xìnlài nǐ de jìyìlì le
过于 can also be used as a verb "to exceed".
Examples
不要供过于求
To avoid oversupply
bú yào gōng guòyú qiú
The verb 过于 is used as part of the phrase 最…莫过于
This phrase emphasizes that something is "the best".
This phrase emphasizes that something is "the best". Pay attention
This structure is used in written language.
Scheme
最
adjective
的
noun
莫过于
In this structure, you first state the topic of the sentence and then you give your answer that you think is the best. The answer is placed after 莫过于. It can be expressed by a noun, a verb or a verb phrase.
Examples
美国最好的大学莫过于哈佛大学
The best university in the United States is Harvard University
měiguó zuì hǎo de dàxué mò guòyú hāfó dàxué
最好的办法莫过于早作准备
The best way is to prepare early
zuì hǎo de bànfǎ mò guòyú zǎo zuò zhǔnbèi