The 13-year-old Chinese golfer Guan Tian-Lang shot a five-over-par 77 at the China Open as he became the youngest to play in a European Tour event.
Guan, who bogeyed his first hole and quickly slipped to five over par before making a birdie at the seventh, was 107 days younger than his compatriot Lo Shik-Kai at the 2003 Hong Kong Open.
England's Matthew Baldwin set the pace with a first-round 65 to finish a shot ahead of a group of six players including Sweden's Fredrik Andersson Hed.
England's Paul Casey finished on four under par, level with former European number one Colin Montgomerie.
