The couple, Xiang Heguo, 40, and Liu Chunyan, 38, has a daughter and a son who are now students in a key senior (High School) in their hometown. “ We wish they could (work hard) study well and have a better future”, said Liu, who used to be a pre-school teacher in their hometown. She quitted her job (for) low salary, (now) work in Taiyuan with (his) her husband this year.
Pang Shunbin, in his 40s, is (peaceful) even-tempered and (don’t) doesn't talk much. His (outgoing) relatively extroverted wife Zhen Juan, cooks meals for plumbers and electricians on the construction site. The couple has two kids, the elder (brother) son is a student in Chongqing University of Technology, while the younger (sister) daugther is a senior high school student. Zhen wish his son could become a graduate student, “ If they study well, they will not live a hard life like us."
(Du) Chen Shanguang and Du (jun) Jun are both 23 years old. They (are) got married in their hometown and have a (over one-year-old) toddler who's more than a year old. They came to work in Taiyuan after this year's Spring Festival. Chen is a little shy and (not talks) doesn't talk much.
Li Jiaofei, 24, came from Honghe, Yunnan Province. Since 18, Li has worked for different construction sites in Taiyuan. Now, Li and his family are still working and living on a construction site. His mother came to take care of his daughter since she was born(,). Now (no space), his daughter is 11 months old.
Comment: Minor sentence structure and grammar mistakes. Good job!