The easiest way to compare is by NOT USING 很 <hěn> with adjective-verbs, because the function of 很 <hěn> is TO STOP adjective-verbs from comparing (as you know from the the section “to be”)
Chinese-people (to be) many.
CHINESE PEOPLE ARE MANY.
Chinese-people (to be) more.
CHINESE PEOPLE ARE MORE.
When we want to say that something is better/worse/bigger/longer THAN something else…
…we use the preposition 比 <bǐ>
<Zhōngguó bǐ Rìběn dà.>
China compared to Japan (to be) bigger.
CHINA IS BIGGER THAN JAPAN.
<Rìběn chá bǐ Zhōngguó chá hǎohē.>
Japanese tea compared to chinese tea (to be) better to drink.
JAPANESE TEA IS BETTER THAN CHINESE.
<Zhège bǐ nàge guì 20 kuài.>
This compared to that (to be) more expensive 20 kuai.
THIS IS 20KUAI MORE EXPENSIVE THAN THAT.
<Tā bǐ wǒ dà wǔ suì.>
He compared to me (to be) bigger 5 years.
HE IS 5 YEARS OLDER THAN ME.