diff --git a/cmd/twsereport/main.go b/cmd/twsereport/main.go
index ed4aae6..5899e8f 100644
--- a/cmd/twsereport/main.go
+++ b/cmd/twsereport/main.go
@@ -88,9 +88,11 @@ func (c *checkGroupList) Add(f checkGroup) {
 var wg sync.WaitGroup
 var twseNo = flag.String("twse", "", "上市股票代碼，可使用 ',' 分隔多組代碼，例：2618,2329")
 var twseCate = flag.String("twsecate", "", "上市股票類別，可使用 ',' 分隔多組代碼，例：11,15")
+var ncpu = flag.Int("ncpu", runtime.NumCPU(), "指定 CPU 數量，預設為實際 CPU 數量")
 var ckList = make(checkGroupList, 1)
 
 func init() {
+	runtime.GOMAXPROCS(*ncpu)
 	ckList.Add(checkGroup(check01{}))
 	ckList.Add(checkGroup(check02{}))
 }
@@ -104,17 +106,19 @@ func main() {
 
 	if *twseCate != "" {
 		l := &twse.Lists{Date: tradingdays.FindRecentlyOpened(time.Now())}
-		catelist = l.GetCategoryList(*twseCate)
-		catenolist = make([]string, len(catelist))
-		for i, s := range catelist {
-			catenolist[i] = s.No
+
+		for _, v := range strings.Split(*twseCate, ",") {
+			catelist = l.GetCategoryList(v)
+			for _, s := range catelist {
+				catenolist = append(catenolist, s.No)
+			}
 		}
 	}
 
 	if *twseNo != "" {
 		twselist = strings.Split(*twseNo, ",")
 	}
-	datalist = make([]*twse.Data, len(twselist)+len(catelist))
+	datalist = make([]*twse.Data, len(twselist)+len(catenolist))
 
 	for i, no := range append(twselist, catenolist...) {
 		datalist[i] = twse.NewTWSE(no, tradingdays.FindRecentlyOpened(time.Now()))