Materase a mokhoa o nepahetseng oa tlhokomelo: ho sebetsana le Shi qoba ho etsa hore materase a be le deformation e feteletseng, u se ke ua etsa hore materase a kobehe kapa a phuthoe, u se ke ua kopanya thapo ka thata;u se ke ua lumella materase sebakeng ka matla ho feta boima ba 'mele, qoba nako e telele o ile a lula materase bohale kapa lumella ngoana materase Shang qhoma, e le a se ke a sebakeng seo ka khatello, led tšepe mokhathala phello otlolla;ho lula u beha materase flip ho sebelisa, ka holimo le ka tlase flip kapa qetellong swap, Kakaretso lelapa 3-6 likhoeli bakeng sa bit hang can;ntle le ho sebelisa lishiti ka ntle, sekoaelo sa materase sa Shang se setle ka ho fetesisa, qoba lane ea materase e litšila, ho hlatsoa ha bonolo, Ho boloka materase a hloekile bohloeki, sebelisa mokotla oa polasetiki oa ho paka, boloka tikoloho e omme, thibela materase ho tsoa mongobo, se lumelle materase. omella nako e telele haholo, e le hore e se ke ea fela.
Baetsi ba libethe tsa bongaka ba ke ke ba emisa tseleng ea ho hlahloba, ho u tlisetsa libethe tsa bongaka tse molemo, tse bonolo ho li sebelisa, theko e boetse e loketse ho feta boima.