Hi, my name is lin and come from wuhan china, a software engineer, i hope one day i can speak english fluently, so i spend a lot of time to study english every day, mostly i use open language ,it's an english study app there so many material about normal life conversation we can use in life, just a few day ago i past my english c1 test , but i still feel it's hard for me to express my self in advanced vocabulary. it's a long way to go . Below is my dairy about computer technology knowledge study or something i really i want to write down here just record things.