`whenYear` >='-3000'
AND `whenYear` <='3000'
AND
(`whereLoc` ='Chengdu' OR (`whereLon` >='103.341' And`whereLon` <='104.791'And`whereLat` >='29.941'And`whereLat` <='31.391'))
ORDER BY `whenYear` ASC, `whenMonth` ASC , `whenDay` ASC,`eventSig` DESC
LIMIT
0
,
100