"What must he have been thinking? How sad must he have been?"
The father said his son initially did not want to say what had been going on for fear of worrying his parents.
The report did not make clear if Zhou Snr had spoken to the teacher or the headmaster of the school, which is in Quanzhou's Huian county, but said several pupils were removed from the boy's class just days after he enrolled.
In a video and images posted online, the youngster can be seen sitting at a desk some distance behind the rest of the class.
Zhou Snr said the languages teacher had questioned the boy's right to attend the school in the first place as he had been ill when he registered.
In a separate report by The Beijing News, the school's headmaster, identified only as Ye, said it would take steps to resolve the situation, including talking to the languages teacher and parents of the other children.
The teacher at the centre of the allegations is currently on sick leave, the report said.
Non-Hodgkin lymphoma is a type of cancer that develops in the body's immune system in cells called lymphocytes. Zhou had been diagnosed with the disease about a year ago, but after the chemotherapy was given a clean bill of health by his doctor.
- South China Morning Post