An Awful Miser [268]

We think our colleague Zhang is very stingy. Whenever we have a lunch or a dinner together, he never pays. It is very difficult or impossible to make him pay. However, yesterday he invited us to dinner. The meal cost about three or four hundred dollars.

What on earth made him  invite us and pay that money? That It was that his wife gave had a baby. He was so pleased that he spent the money, which was very strange thing for him.

(This is a liberal translation of a Chinese text from "http://bitex-cn.com/". I did not post the original text, so just correct my English. Thank you in advance.)

Note: Two feats - reading Chinese and writing in English, so very good !

An Awful Misery [268]

We think our colleague Zhang is very stingy. Whenever we have a lunch or a dinner together, he never pays. It is very difficult or if not impossible to make him pay. However, yesterday he invited us dinner. (Though it is accepted colloqueally to write "However, yesterday" it is worth noting that saying "Yesterday, however," is more technically correct gramatically) The meal cost about three or four hundred dollars.

On earth, what made him to invite us and pay that money? (While "pay that money" is prefectly inteligible, normally there would be an additional adjective. Such as "pay all that money" or "pay that much money") That was Turns out, his wife gave had a baby. He was so pleased that he spent the money, (again, "spent the money" makes sense, but an English speaker might refer again to what he spent the money on, such as "that he splurged on our meals") which was very strange thing for him.

(This is a liberal translation of a Chinese text from "http://bitex-cn.com/". I did not post the original text, so just correct my English. Thank you in advance.)

Okay, most of this is just suggestions for alternate phrasing as opposed to actually word for word corrections. I think you're quite good at translitteration. ^_^