The structure 正因为…才
"That’s why..."
The structure 正因为…才 
emphasizes that an event or an action is only happening due to a specific reason.
The reason comes after 正因为, and the event or action comes after 才.
In a sentence, the subject is placed before 才.
emphasizes that an event or an action is only happening due to a specific reason.
The reason comes after 正因为, and the event or action comes after 才.
In a sentence, the subject is placed before 才.Scheme
正因为
reason
subject
才
event/action
Examples
正因为如此，她才买了一台电脑
That’s why she bought a computer
zhèng yīnwèi rúcǐ, tā cái mǎi le yì tái diànnǎo
正因为这个原因，我才来到这里
That is why I’m here
zhèng yīnwèi zhè ge yuányīn, wǒ cái lái dào zhèlǐ
正因为有大家的共同努力，公司才会发展得这么快
It is because of our collective effort that the company can develop so quickly
zhèng yīnwèi yǒu dàjiā de gòngtóng nǔlì, gōngsī cái huì fāzhǎn de zhème kuài
If there are two subjects in the sentence, one of the the subjects is placed after 正因为, and the second subject is placed before 才.
Scheme
正因为
subject 1
reason
subject 2
event/action
Examples
正因为我关心你，我才不要你太晚回家
I don’t want you to come back home late because I care about you
zhèng yīnwèi wǒ guānxīn nǐ, wǒ cái bú yào nǐ tài wǎn huí jiā
正因为他是大老板，他才会逃脱制裁
He’ll get away with it only because he is the boss
zhèng yīnwèi tā shì dà lǎobǎn, tā cái huì táotuō zhìcái