(Corrects detail mentioned by NormStar report in para 20) By Martin Quin Pollard BEIJING (Reuters) -Jenny Bai was among 10 high-performing computer science students from different Chinese universities selected by a Beijing-based internet firm for a job upon graduation, following four rounds of arduous interviews. But last month, the company told the students their contract offers were cancelled due to COVID-19 headwinds and the bad state of the economy in general – obstacles facing a record 10.8 million Chinese university graduates this summer. “I’m worried,” said Bai, who graduated this month…