Kumanga Laibulale yoyambirira ya Ankang idatsegulidwa mu 1984, ndipo malo ake anali atatsala pang'ono kukonzedwanso. Ntchito yokonzanso yakonzanso laibulale yakale kukhala malo atsopano, otseguka ndi olandirira anthu ammudzi, kuwonetsa ndi kupanga kusiyana kwakukulu ndi zomwe zilipo. Chiyambireni kutsegulidwa, laibulale yatsopanoyi yatsitsimutsanso chikhalidwe cha anthu ammudzi, ndipo chiwerengero cha alendo tsiku ndi tsiku chawonjezeka kuchoka pa anthu 10 kufika pa anthu 3,000.