KARACHI - Two Chinese, an Iranian and a Thai have reached the penultimate semi final stage of the IBSF World under-21 snooker championship now under progress at Kish Island in Iran, according to information received here Wednesday. Soheil Vahedi of Iran, Li Yan and Liu Chuang of China and Noppon Seengkham of Thailand won their quarter-finals to grab a place in the penultimate knock out round. Results: Quarter-finals: Soheil Vahedi (Iran) beat Shi Hanqing (China) 6-1 Li Yan (China) beat Yuttapop Pakpoj (Thailand) 6-2 Noppon Seengkham (Thailand) beat Thanawat Tirapongpaiboon (Thailand) 6-9 Liu Chuang (China) beat Amir Sarkhosh (Iran) 6-0. Pre Quarter-Finals: Shi Hanqing (China) beat Muhammed Ibrahim (Egypt) 5-0 Soheil Vahedi (Iran) beat Muhammed Lababi (Iran) 5-1 Yuttapop Pakpoj (Thailand) beat Karam Fatima (Syria) 5-1 Li Yan (China) beat Ali NK Al Obaidiy (Qatar) 5-0 Thanawat Tirapongpaiboon (Thailand) beat Navid Shafiee (Iran) 5-1 Noppon Seengkhan (Thailand) beat Shahbaaz Adil Khan (India) 5-2 Liu Chuang (China) beat Hosein Vafaei (Iran) 5-3 Amir Sarkhosh (Iran) beat Asjad Iqbal (Pakistan) 5-3.