The Iranians entered the United States in 2014 on visas issued by the Obama administration.
The cleric made the statement in a Facebook post on Friday.
Mr Tinubu stated, “This is a government that cares.”
The monarch said that his doctors asked him to remain in Beijing for extra one or two months for treatment.
Mr Tinubu, during his visit, commissioned projects and inaugurated 60-megawatt gas turbine plants.
This followed the earlier redesignation of Nigeria as a Country of Particular Concern.
The scholarship applications end on April 29.
Applicants must be citizens of Nigeria resident in Abuja.
The American government on Wednesday commenced the evacuation of its staff and family members from Nigeria over deteriorating security.
Earlier in February, Ukrainian authorities said that more than 1,700 Africans were fighting for Russia.
