Who is Lin Nai-Nai in the memoir, Homesick: My Own Story?

Lin Nai-Nai is Jean's Chinese nurse. She teaches Jean embroidery, and Jean teaches her English. Something of a rebel, Lin Nai-Nai has run away from her husband because she did not want to be a second wife. Lin Nai-Nai's own parents now refuse to see her, even when she risks her life to bring them food during a siege. Jean comes to realize that she loves Lin Nai-Nai even though the nurse sometimes angers or irritates her—Just as, upon reflection, she realizes that she has grown to love China.