Correct

定规

/ dìngguī / 
Strokes

Definition

to decide/to determine/established practice/(dialect) firmly resolved (to do sth)

Example

As a Noun

established rule/practice; set pattern

1
Zhèzhǒng
这种
zuòfǎ
做法
zài
在
zhèlǐ
这里
yǐ
已
chéng
成
dìng
定
guī
规
  
。

This has become the established practice here.

2
Wú
无
dìng
定
guī
规
kě
可
xún
循
  
。

There is no hard and fast rule to go by.

As an Adverb

firmly; resolutely