HSK V7-9
Correct

头号

/ tóuhào / 
Strokes

Definition

first rate/top rank/number one

Example

As an Adjective
number one; size one
1
Tóuhào
头号
zì
字

size one type

2
Tóuhào
头号
zhǒngzixuǎnshǒu
种子选手

top seed; top seeded player/athlete

3
Tóuhào
头号
zhèngdí
政敌

top political rival

4
Tóuhào
头号
wèntí
问题

number one problem

5
Tóuhào
头号
dírén
敌人

number one enemy; archenemy

As an Adjective
best; first-class; top-quality
6
Tóuhào
头号
miánhua
棉花

top-quality cotton; top-grade cotton