diff --git a/app/tl.tsx b/app/tl.tsx
index acdd5d2..0011ee9 100644
--- a/app/tl.tsx
+++ b/app/tl.tsx
@@ -257,7 +257,7 @@ export const Timeline: React.FC<Props> = React.memo(({
                 24625.670894409748,
                 4964.7447283082365,
             ],
-            initialZoomLevel: 4964.7447283082365,
+            initialZoomLevel: 24625.670894409748,
             onDateChange: async (date: Date) => {
                 const datestr = formatInTimeZone(date, 'UTC', 'yyyyMMddHHmmss')
                 const url_base = process.env.NEXT_PUBLIC_GRAPHQL_BACKEND_URL?.replace('/graphql', '') || 'http://localhost:3050'
diff --git a/lib/timeline.ts b/lib/timeline.ts
index 211c8e1..d143faf 100644
--- a/lib/timeline.ts
+++ b/lib/timeline.ts
@@ -74,7 +74,7 @@ interface TimelineConfig {
     /** 初始中心时间（时间戳，默认当前时间） */
     initialCenterTime?: number;
     /** 初始显示范围（毫秒，默认1小时） */
-    initialTimeRange?: number;
+    initialTimeRange?: number | null;
     /** Initial Zoom Level */
     initialZoomLevel?: number | null;
     /** 缩放模式 */
@@ -455,7 +455,7 @@ class ScaleManager {
             {
                 level: TimeFormatLevel.HalfHour,
                 majorInterval: 30 * 60 * 1000,  // 30分钟
-                minorTicks: 3,  // 每10分钟一个次刻度
+                minorTicks: 4,  // 每10分钟一个次刻度
                 minPixelDistance: 50,
                 maxPixelDistance: 120,
                 formatter: (date: Date) => ({
@@ -937,7 +937,7 @@ class RealTimeTimeline {
 
         const defaultConfig: Required<TimelineConfig> = {
             initialCenterTime: Date.now(),
-            initialTimeRange: 60 * 60 * 1000, // 1小时
+            initialTimeRange: null, // 1小时
             initialZoomLevel: null,
             zoomMode: ZoomMode.MousePosition,
             zoomSensitivity: 0.001,