Correct

引言

/ yǐnyán /
Strokes

Definition

foreword/introduction

Example

As a Noun

forward; introduction

1
Wǒ
我
yǐ
已
xiě
写
hǎo
好
le
了
gāishū
该书
de
的
yǐnyán
引言
。

I have finished my introduction to the book.