In HSK 1 grammar, under 词类 → 数词, the forms include: 一、二/两、三、四、五、六、七、八、九、.
一
yī
one
二/两
三
sān
three
四
sì
four
五
wǔ
five
六
liù
six
七
qī
seven
八
bā
eight
九
jiǔ
nine
暂无。