HAIKOU, Dec. 18 (Xinhua) — The parents of seven-year-old Gungun (pseudonym) finally saw a light at the end of the tunnel when they heard that a foreign medicine they craved for their ill son might be available at a special medical pilot zone in Hainan Province.
Four years ago, the parents got the heart-wrenching message that Gungun was diagnosed with Acid Sphingomyelinase Deficiency (ASMD), a life-threatening g