How to determine one person's strength or weakness of his/her SELF ELEMENT? Does it based on the basket of elements the person has or the month pillar in which he/she was born? Which one carries more weigh, the basket of elements or the month of birth?

Dear Dan, I'm not sure what you mean with 'basket of elements'. I presume it refers to the elements surrounding the Self Element. The SEASON determines the strength of the Self Element. So you refer to the month branch. Many make the mistake of 'counting' the number of elements. This is inaccurate, because the season sets the pace for the entire chart. Cheers! SN