Uhlalutyo lwesiphako sevalve yaseTshayina: ukuhamba okungalungisekiyo
Uhlalutyo lwesiphako sevalve yaseChina: ukuhamba okungalungisekiyo I-China itshekhi ivalve sisixhobo sokulawula ulwelo olusetyenziswa ngokuqhelekileyo, oluneenzuzo zokuthintela ukutywinwa kwe-countercurrent kunye nokutywinwa okuhle. Nangona kunjalo, iivalve zokujonga zaseTshayina zineengxaki ezithile, eyona nto iphambili phakathi ...
jonga iinkcukacha