Those figures are for the J-11A.
The J-11B manages to cut about 700kg of weight and uses increased thrust WS-10A engines, which should give a T/W ratio of about 1.17. Also, someone at Wiki hasn't checked their math - T/W for MKI is (2 x 27,600 lbf) / 54,895 lb loaded weight = 1.01
The N001VE...