diff --git a/codes.go b/codes.go
index b8b1d6e..b457e95 100644
--- a/codes.go
+++ b/codes.go
@@ -1,6 +1,7 @@
 package tdx
 
 import (
+	"github.com/injoyai/conv"
 	"github.com/injoyai/logs"
 	"github.com/injoyai/tdx/protocol"
 	"github.com/robfig/cron/v3"
@@ -108,14 +109,15 @@ func (this *Codes) GetName(code string) string {
 }
 
 // GetStocks 获取股票代码,sh6xxx sz0xx sz30xx
-func (this *Codes) GetStocks(limit ...int) []string {
+func (this *Codes) GetStocks(limits ...int) []string {
+	limit := conv.DefaultInt(-1, limits...)
 	ls := []string(nil)
 	for _, m := range this.list {
 		code := m.FullCode()
 		if protocol.IsStock(code) {
 			ls = append(ls, code)
 		}
-		if len(limit) > 0 && len(ls) >= limit[0] {
+		if limit > 0 && len(ls) >= limit {
 			break
 		}
 	}
diff --git a/manage.go b/manage.go
index f1dba7b..be11c4a 100644
--- a/manage.go
+++ b/manage.go
@@ -22,16 +22,9 @@ func NewManage(cfg *ManageConfig, op ...client.Option) (*Manage, error) {
 		cfg.WorkdayDir = "./data/database"
 	}
 
-	//连接池
-	p, err := NewPool(func() (*Client, error) {
-		return DialHosts(cfg.Hosts, op...)
-	}, cfg.Number)
-	if err != nil {
-		return nil, err
-	}
-
 	//代码
-	codesClient, err := DialHosts(cfg.Hosts, op...)
+	DefaultCodes = &Codes{}
+	codesClient, err := DialHostsRandom(cfg.Hosts, op...)
 	if err != nil {
 		return nil, err
 	}
@@ -40,6 +33,15 @@ func NewManage(cfg *ManageConfig, op ...client.Option) (*Manage, error) {
 	if err != nil {
 		return nil, err
 	}
+	DefaultCodes = codes
+
+	//连接池
+	p, err := NewPool(func() (*Client, error) {
+		return DialHosts(cfg.Hosts, op...)
+	}, cfg.Number)
+	if err != nil {
+		return nil, err
+	}
 
 	//工作日
 	workdayClient, err := DialHosts(cfg.Hosts, op...)