Nov 21 (Reuters) - Enn Ecological Holdings Co Ltd 600803.SS
* SAYS IT AGREES TO BUY 32.8% STAKE IN ENN ENERGY HOLDINGS LTD 2688.HK FOR 25.8 BILLION YUAN ($3.67 billion) VIA CASH, ASSET SWAP AND SHARE ISSUE
* SAYS ASSET THAT WILL BE SWAPPED IS UNITED FAITH VENTURES LTD WHICH INDIRECTLY HOLDS 9.97% STAKE IN SANTOS LTD STO.AX