A3 was basically designed to carry heavy pay load 2.5 tons to chinese target. A2, A1 and A4 can carry a bit higher than 1 ton payload, A3 can carry more than double payload anywhere in china. A5 can carry 1.5 tot to atleast 5800 Km where as A6 will carry atleast 3 tons to atleast 6000 KM.