The adverb and the adjective 相反
The word 相反 
can be either an adjective or an adverb.
As an adverb, 相反 has the meaning “on the contrary”.
can be either an adjective or an adverb.
As an adverb, 相反 has the meaning “on the contrary”. Pay attention
In a sentence, we should place commas before and after 相反.
Examples
他没觉得无聊，相反，觉得很有趣
He didn't find it boring. On the contrary, he found it very interesting
tā méi juéde wúliáo, xiāngfǎn, juéde hěn yǒuqù
这根本不麻烦，相反，我很乐意帮助你
It's not troublesome at all. On the contrary, I'd be happy to help you
zhè gēnběn bù máfan, xiāngfǎn, wǒ hěn lèyì bāngzhù nǐ
我们都以为他会成功，相反，它却失败了
We all thought he would succeed, but he failed
wǒmen dōu yǐwéi tā huì chénggōng, xiāngfǎn, tā què shībài le
As an adjective, 相反 has the meaning “opposite”, “contrary”.
Examples
这个问题和上一个问题相反
This question is the opposite of the previous question
zhè ge wèntí hé shàng yí ge wèntí xiāngfǎn
当然，也有一些相反的观点
Of course, there are opposing views
dāngrán, yě yǒu yìxiē xiāngfǎn de guāndiǎn
在南方，情况相反
The opposite situation is developing in the south
zài nánfāng, qíngkuàng xiāngfǎn