Today is a good day

After a busy day, I went out for dinner with my colleagues. We eat ate Pork Sliced Boiled Chicken, it tastes tasted excellent. I think I'll come back later another time/again.Then, we went to the a tea shop. The shop fit to chat that have a good environment.The conversation is very helpful to my work.  The tea shop was a pleasant place to have a chat with friends/colleagues. The conversation that we had was very useful regarding my work.

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That was a really good piece, just a few problems regarding the tense! As the other correction mentioned, once you start a text with the past tense and continue the description, you must keep it in the past tense. You seemed to know this as you switched back into the past tense halfway through, but just try and remember. 

- I want to quickly explain why I changed "I think I'll come back later' to "I think I'll come back again/another time", I did this because putting "later" gave the impression that you would be going back on the same day. Saying again (or) another time avoids any confusion.

Hope this helped, best of luck with your studies!

Today is a good day

After a busy day, I went out for dinner with my colleagues. (Note: Since your first sentence is past tense, the other sentence should be too.) We eat Pork Sliced Boiled Chicken,It tastes excellent. (We ate Pork Sliced Boiled Chicken and It tasted excellent.) I think I'll come back later. (I think I will eat there again.) Then,we went to the tea shop. (Later/Afterwards, we went to a tea shop. Note: use "a" or "an" if the thing is not known to the listener. Use "the" or "that" if the thing is known. Since the reader does not know the tea shop, you should use "a". )The shop fit to chat that have a good environment. (The shop was a fitting environment to have a conversation with friends. OR It was the perfect environment to have a conversation with friends.) The conversation is very helpful to my work. (We discussed work related issues that I found very useful.)