New Chinese new tTea

- Use capitalization for words part of a title
- Word order of adjectives

Let me introduce you the tendency of the tea these yearso the history of tea in China.

'Let me introduce you' is followed by preposition 'to'
Here I think you mean 'the history of tea'

Tea has a long history, there are several different legends about its invention.

remember to use a space after any punctuation

The most popular one is ShenNong, who had tried over hundreds of plants to identify which ones could be used as medicine and during the period that he founded Ttea.

depending on what you're trying to say:
'who had tried hundreds of plants to...' = multiple hundreds of plants
or 'who had tried over a hundred plants to...' = just over a hundred plants

China has a vast territory and abundant resources, different regions have different tastes. So, there areis a wide variety of Tea. For e sxamples, black tea which has a fermentation process is popular oin the west partern region and on the contrary the, green tea without this process is widely accepted among the south part.lern people. Let alone the red tea, white tea, flower tea and so on.

However, Chinese teenagers feel bored aboutare not interested in the traditional tea.

'not interested in' is more applicable than 'feel bored about' here.
If someone 'feels bored', they are usually talking about them not having anything to do. Or if something is 'boring' then they are talking about how something is not interesting.
So you could say, 'Chinese teenagers find that traditional tea is boring.'

The merchants have seen this opportunity keenly, and bringtherefore have brought out new tea,s, which mixes milk or, fruit or, dessert raw materials or even wine to us. The latest news about the new tea is RuiXing,the A new band of tea，coope that has collaboratesd with the most famous wine brand MaoTai，make to launch a wine coffee/wine tea launching in the market and cause a huge respondse.

Let me introduce you the tendency of the teao the history of tea over these years in China.

Instead of “tendency”, you probably mean “trend through time” or “history”

Tea has a long history,t. There are several different legends about its invention.

The most popular one is ShenNong,who had tried over a hundreds plants to identify which could be used as medicine, and during theat period he founded T tea.

Could also use “discovered” instead of “found,” which is the past tense of “to find”

China has a vast territory and abundant resources, with different regions that have different tastes. So, there areis a wide variety of Ttea. For e sxamples, black tea, which has a fermentation process, is popular oin the west part and o. On the contrary the green tea without this process is widely accepted among the south part.let alone the There is also red tea, white tea, flower tea and so on.

“West part” and “south part” would sound a bit better as “western part” and “southern part”

However, Chinese teenagers feel bored about withe traditional tea.

The mMerchants have seen this opportunity keenly, and bring new tea,s, which mixes milk or, fruit or, dessert raw materials, or even wine, to us. The latest news about new tea is RuiXing,the a new brand of tea，coope that has collaboratesd with the most famous wine brand MaoTai，make to launch a wine coffee/wine tea launching in the market and cause a huge respondse.