RED CHINA FIXING FRONTIERS RED CHINA PRODUCED A SECOND SURPRISE LAST WEEK 
. AT PEKING AIRPORT, PREMIER CHOU EN-LAI WELCOMED OUTER MONGOLIA'S PREMIER 
YUMZHAGIIN TSEDENBAL, 46, WHO IS NORMALLY REGARDED AS A RUSSIAN PUPPET 
. WHISKED OFF IN A BLACK, SOVIET-MADE LIMOUSINE AMONG CROWDS DUTIFULLY 
WAVING CHINESE AND MONGOLIAN FLAGS, TSEDENBAL WAS PUT THROUGH THE USUAL 
ROUTINE OF TOASTS, BANQUETS AND FULSOME SPEECHES . THEN, ON THE 
SAME DAY THAT RED CHINA ANNOUNCED PLANS TO DEFINE ITS BORDERS 
WITH PAKISTAN, TSEDENBAL AND CHOU EN-LAI SIGNED A TREATY FIXING THE 
2,500-MILE FRONTIER BETWEEN THEIR TWO COUNTRIES . IT WAS ANOTHER LITTLE 
LESSON AIMED AT DELHI . AT THE FAREWELL BANQUET FOR TSEDENBAL, 
PREMIER CHOU EN-LAI SMOOTHLY NOTED THAT RED CHINA HAD NOW SOLVED 
ITS BORDER PROBLEMS ON THE BASIS OF " PEACEFUL COEXISTENCE " 
WITH BURMA, NEPAL, PAKISTAN AND OUTER MONGOLIA, MAKING THE POINT THAT 
ONLY TWO NEIGHBORS NOW REMAIN WITH WHOM CHINA HAS NOT MADE 
A BORDER ADJUSTMENT : INDIA AND THE SOVIET UNION . 