修复IsSZStock的判断

example/GetHistoryTradeAll/main.go

@@ -8,7 +8,7 @@ import (
 
 func main() {
 	common.Test(func(c *tdx.Client) {
-		resp, err := c.GetHistoryMinuteTradeDay("20241025", "sz000001")
+		resp, err := c.GetHistoryMinuteTradeDay("20251010", "sh000001")
 		logs.PanicErr(err)
 
 		for _, v := range resp.List {

example/TradesToKlines/main.go

@@ -9,7 +9,7 @@ import (
 func main() {
 	common.Test(func(c *tdx.Client) {
 
-		resp, err := c.GetHistoryTradeAll("20251010", "sz000001")
+		resp, err := c.GetHistoryTradeDay("20251010", "sz000001")
 		logs.PanicErr(err)
 
 		ks := resp.List.Klines()

extend/pull-trade.go

@@ -56,7 +56,7 @@ func (this *PullTrade) PullYear(ctx context.Context, m *tdx.Manage, year int, co
 
 		var resp *protocol.TradeResp
 		err = m.Do(func(c *tdx.Client) error {
-			resp, err = c.GetHistoryTradeAll(date, code)
+			resp, err = c.GetHistoryTradeDay(date, code)
 			return err
 		})
 		if err != nil {

protocol/unit.go

@@ -262,7 +262,7 @@ func IsStock(code string) bool {
 }
 
 func IsSZStock(code string) bool {
-	return len(code) == 8 && strings.ToLower(code[0:2]) == ExchangeSZ.String() && code[2:3] == "0"
+	return len(code) == 8 && strings.ToLower(code[0:2]) == ExchangeSZ.String() && (code[2:3] == "0" || code[2:4] == "30")
 }
 
 func IsSHStock(code string) bool {