Conversation so far:
What religion was Sun born with?
CANNOTANSWER.
Did the article say why he was interested in Christianity?
Schriffin writes that Christianity was to have a great influence on Sun's whole future political life.
Is there any other data on his religious views?
Schriffin writes that Christianity was to have a great influence on Sun's whole future political life.
how did his views on christianity affect his politics?
Sun came into contact with the Teachings of the Baha'i Faith, expressing his appreciation for the Cause and declaring it "highly relevant to the needs of China..
Was he ever baptized?
Sun was later baptized in Hong Kong (on May 4, 1884.

Question: Who baptized him?
Self-contained rewrite: Who baptized Sun Yat-sen?