The toddler has been taken to hospital and it is not clear if the youngster is a boy or a girl or the extent of the child's injuries.
A 'bullet' train was travelling south from the Zhejiang provincial capital of Hangzhou when it lost power in the lightning strike and was hit from behind by the second train, the official Xinhua News Agency said.
Rescuers found more bodies on Sunday afternoon, bringing the death toll to 43.
Almost 200 people remain in hospital, 12 of them in critical condition, the official Xinhua news agency said.
Two foreigners died in the accident, according to the semi-official China News Service, including a woman in her 20s.
One train had left Beijing and both trains were destined for Fuzhou in eastern Fujian province.
Authorities moved quickly to assuage public anger by sacking the head of the Shanghai railway bureau, his deputy and the bureau's Communist Party chief, the Railways Ministry said in a statement on its website. Read More