Correct

硬性

/ yìngxìng / 
Strokes

Definition

rigid/inflexible/hard (drug)

Example

As an Adjective

hard; rigid; inflexible

1
Cānjiā
参加
wǎndǎo
晚祷
bìngfēi
并非
yìngxìng
硬性
guīdìng
规定
  
。

Attendance at evening prayers is not compulsory.

2
Yìngxìng
硬性
de
的
guīdìng
规定

rigid and inflexible rules; hard-and-fast rules

3
Zuō
作
yìngxìng
硬性
guīdìng
规定

lay down rigid/hard/fast rules; lay down a cast-iron rule

As an Adjective

(of drugs) hard

4
Zhùshè
注射
yìngxìng
硬性
dúpǐn
毒品

be mainlining on hard drugs