I think the major problem here is from the deceased persons, they have been using documents and addresses that does not give true detail about themselves which make it difficult for Chinese to trace their relative's where about .
And Nigeria government also should be blame for its insensitivity to its people, government need to claim these corpse to Nigeria for burial as an honour to its citizen irregardless of the causes of their death. Nigeria government should know that such insensitivity is another negative portray of Nigeria in Foreign nations, if our government care not about its citizen then what can we say of foreign nation maltreating us.