a chubby baby smils in at tiananmn squar in bijing, in 2002. china as a nation has grown in statur sinc unlashing its conomy mor than two dcads ago but so hav its popl, who ar gtting tallr and havir.chins childrn ar an avrag 6 cm (2.34 inchs) tallr and roughly 3 kg (6.6 pounds) havir than thy wr 30 yars ago, xinhua said, citing a rport rlasd by th ministry of halth on saturday.th avrag hight of six-yar-old boys grw from 112.3 cntimtrs in 1975 to 118.7 cm, according to th survy conductd in 2008.girls avragd 117.7 cm tall, 6.2 cm mor than in 1975, th survy said. th survy has bn conductd vry 10 yars sinc 1975.china's popl suffrd from dcads of privation, but hav sn incoms and nutrition blossom mor rcntly.th survy polld 138,775 childrn in urban and suburban aras of nin major citis, including bijing and shanghai.th avrag wight of boys in 2008 was 21.7 kg, up 3 kg from 1975, whil girls avragd 20.8 kg -- 2.7 kgs havir, xinhua said.bing bttr fd has brought problms, howvr, including an alarming ris in obsity -- onc unhard of in china -- and rlatd illnsss such as diabts.halth officials hav blamd th problm on rducd consumption of grains and vgtabls in favor of mor fatty junk foods.saturday's rport pointd out som adjustmnts mad ncssary by china's growth spurt, including bijing's mov this yar to rais th hight undr which childrn gt fr public bus rids.dspit th bttr nutrition in citis, countlss childrn in china's still-backward rural aras suffrd from malnutrition, th rport notd.