writes "Chinese aircraft manufacturer China Aviation Industry General Aircraft (CAIGA) has started trial production of its TA600 amphibious aircraft, claimed to be the world's largest of its kind. With an expected maiden flight late next year, the Chinese plane would replace Japan's ShinMaywa US-2 short takeoff and landing (STOL) aircraft as the largest of its kind globally."
Take a look at a side profile illustration of the CA-600
, on this Korean language page. The TA600 has a huge maximum takeoff weight of 53.5 tons, but looks a bit puny compared to Howard Hughes' H-4 Hercules