Ho Meng Wei of Chinese Taipei (Taiwan) made history by playing his debut Olympiad game at 7 years, 11 months and 12 days. He has broken previous documented record by more than 3 years.
Unfortunately he lost his first game in round 2 vs M.Siban of Suriname.

It has to be stressed that Chinese Taipei was only admitted to FIDE back in 2004 and has virtually no chess tradition. There are just 19 rated players (the top one is merely 2165) and Meng Wei is one of them rated 1550. So far he had played in three FIDE rated tournaments, the first one was V Open Int. Ayuntamiento in Pontevedra, Spain where (at six!) he had scored 2.5/8. He also took part in the recently concluded World Youth Chess Championship in Vietnam, but he did poorly scoring just 4.5/11 in U8 Open section.

So far Meng Wei scored 0/2 in Dresden and is sill looking for his first spoils.
Ho Meng Wei's Olympiad card
Ho Meng Wei's FIDE ID (where he incorrectly appears as Ho Men-Wei)
Interview on the official Olympiad site mentioning Meng Wei