2001? ????
100?? ????
1000? ???
80?? ??? ???
2001?? ??? Big Tree??? 1?, 2?,3? ??? ???? ?? ??? ??????. ? 1?? ?????????, 2?? ?????????, 3???? ??? ?? ???? ???? ???????. ??? ? ??? 10??????? ???? ????? 20????? ???? ???? ??Big Tree??????????, ??Big Tree???????????, ??Big Tree?????????? ????. ??? ??Big Tree??????????? 2016?11?? ?????4? 6753????? ?????? 2020? 11? ????????? ???????????? ????? ?????. ????????, ???????? ????, ???????????, "??????" ???? ??? ????, ??? "???" ???, 2020? 7? ?????????? ????????????? ??? ?1? ????????? ???????. ??? ????? ????? ? ??????? ????, ?? ? ?????.
??? ?? ?, ?, ?? ? ???? ???? ?????????? ?????? ????? ???? Big Tree?????????? ???? ????? 8,000??????? "Big Tree????" ???? ???? ????(??)??????????? ???? ???? 4300???? ??? "?????????(??)????????"? ??????. ??????????? ??? ?? ?? ????????? ?? ?? ????? 4%??? ???? ????????? ?? 40-50%??? ??????. ???? ??? 85???? ????? ???? 100???? ??? ??? ????? ?? ? ????? ???? 3? ?? ??? ??????.
????????? ???????? ????? ???? ????????????? ????? Big Tree?? 1000?????? ???? ?? 4???????? ????, ??, ??, ????, ????? ??? ????????? ???? ?? ???? ?????????? ????? ????? ???? ??? ?????. ???, ???, ???,??? 4??? ???? ?? ?? ??? ??????????? ??????. 5??? 15???? ?????? ??????????? ??? ????.