diff --git a/README.md b/README.md
index 718a9531..b3b64bee 100644
--- a/README.md
+++ b/README.md
@@ -7,12 +7,14 @@ A reverse proxy like nginx, built on [pingora](https://github.com/cloudflare/pin
 ## Feature
 
 - Filter location by host and path
+- Path rewrite with regexp
 - HTTP 1/2 end to end proxy
 - TOML base configuration, file or etcd storage
 - Graceful reload and auto restart after the configuration is changed
 - Template for http access log
 - Admin Web UI configuration
 - Genrate TLS certificates from let's encrypt
+- Notification events: `lets_encrypt`, `backend_unhealthy`, `diff_config`, `restart`, etc.
 - Http proxy plugins: `compression`, `static serve`, `limit`, `stats`, `mock`, etc.
 
 ## Start
diff --git a/SUMMARY.md b/SUMMARY.md
index 5a1610f9..57d507bf 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -1,6 +1,7 @@
 # Summary
 
 - [介绍](./docs/introduction_zh.md)
+- [命令行参数](./docs/args_zh.md)
 - [处理流程](./docs/phase_chart_zh.md)
 - [配置说明](./docs/config_zh.md)
 - [Location说明](./docs/location_zh.md)
diff --git a/docs/args_zh.md b/docs/args_zh.md
new file mode 100644
index 00000000..066d2dee
--- /dev/null
+++ b/docs/args_zh.md
@@ -0,0 +1,14 @@
+---
+description: Pingap 配置说明
+---
+
+Pingap的大部分参数均是配置toml配置文件来指定，而有一些参数则是需要在启动程序时指定的，具体如下：
+
+- `conf`或者`c`: 默认为当前目录，指定配置文件或配置文件目录，建议使用目录的形式，便于配置按类型管理
+- `daemon`或者`d`: 可选，是否指定以后台服务的形式启用，若需要使用upgrade的形式无中断式加载新配置，则需要使用此模式
+- `upgrade`或`u`: 可选，以更新程序模式启用，此模式下新的程序会通过unix socket接收原有的程序的请求，避免请求中断
+- `test`: 可选，仅测试配置是否正确
+- `log`: 可选，指定日志输入目录
+- `admin`: 可选，配置admin的监听地址，形式为`base64(user:pass)@ip:port`，其中认证部分是basic auth，若不配置则不校验，建议配置
+- `adminnode`: 可选，是否管理节点，对于使用etcd存储配置的部署使用，设置后此节点只用于配置参数，避免配置有误导致节点无法启动，其它节点则加载对应配置运行。
+- `autorestart`: 可选，是否在配置有更新时自动重启，建议使用此方式达到准实时更新配置的效果
diff --git a/docs/log_zh.md b/docs/log_zh.md
index 7439c4d1..c1889987 100644
--- a/docs/log_zh.md
+++ b/docs/log_zh.md
@@ -11,7 +11,7 @@ Pingap格式化可以使用以下几种默认形式`combined`，`common`，`shor
 - `{query}`: 请求的querystring
 - `{remote}`: 请求的源ip
 - `{client-ip}`: 客户ip，根据`x-forwarded-for`中获取
-- `{scheme}`: TODO
+- `{scheme}`: 协议类型，https或http
 - `{uri}`: 请求的完整地址
 - `{referer}`: 请求头中的referer
 - `{user-agent}`: 请求的user-agent
diff --git a/src/http_extra/http_response.rs b/src/http_extra/http_response.rs
index 1fbc1199..a649095f 100644
--- a/src/http_extra/http_response.rs
+++ b/src/http_extra/http_response.rs
@@ -45,6 +45,14 @@ pub fn get_super_ts() -> u32 {
     }
 }
 
+pub fn get_hour_duration() -> u32 {
+    if let Ok(value) = SystemTime::now().duration_since(UNIX_EPOCH) {
+        (value.as_millis() % (3600 * 1000)) as u32
+    } else {
+        0
+    }
+}
+
 fn get_cache_control(max_age: Option<u32>, cache_private: Option<bool>) -> HttpHeader {
     if let Some(max_age) = max_age {
         let category = if cache_private.unwrap_or_default() {
diff --git a/src/main.rs b/src/main.rs
index f8f8c40e..34c637cb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -296,7 +296,6 @@ fn run() -> Result<(), Box<dyn Error>> {
         let _ = perf::start_pyroscope(url)?;
     }
 
-    // TODO load from config
     let mut proxy_plugin_confs: Vec<(String, ProxyPluginConf)> = conf
         .proxy_plugins
         .iter()
diff --git a/src/proxy/logger.rs b/src/proxy/logger.rs
index b9da40df..257cea45 100644
--- a/src/proxy/logger.rs
+++ b/src/proxy/logger.rs
@@ -385,6 +385,14 @@ impl Parser {
                             "reused" => buf.extend(ctx.reused.to_string().as_bytes()),
                             "upstream-address" => buf.extend(ctx.upstream_address.as_bytes()),
                             "processing" => buf.extend(ctx.processing.to_string().as_bytes()),
+                            "upstream-connect-time" => {
+                                if let Some(value) = ctx.upstream_connect_time {
+                                    buf.extend(
+                                        format!("{:?}", Duration::from_millis(value as u64))
+                                            .as_bytes(),
+                                    );
+                                }
+                            }
                             _ => {}
                         }
                     }
diff --git a/src/proxy/server.rs b/src/proxy/server.rs
index bc14f1e2..4fb15497 100644
--- a/src/proxy/server.rs
+++ b/src/proxy/server.rs
@@ -16,7 +16,7 @@ use super::logger::Parser;
 use super::{Location, Upstream};
 use crate::acme::{get_lets_encrypt_cert, handle_lets_encrypt};
 use crate::config::{LocationConf, PingapConf, ProxyPluginStep, UpstreamConf};
-use crate::http_extra::HTTP_HEADER_NAME_X_REQUEST_ID;
+use crate::http_extra::{get_hour_duration, HTTP_HEADER_NAME_X_REQUEST_ID};
 use crate::plugin::get_proxy_plugin;
 use crate::state::State;
 use crate::util;
@@ -478,6 +478,7 @@ impl ProxyHttp for Server {
         let peer = lo.upstream.new_http_peer(ctx, session).ok_or_else(|| {
             util::new_internal_error(503, format!("No available upstream({})", lo.upstream_name))
         })?;
+        ctx.upstream_connect_time = Some(get_hour_duration());
 
         Ok(Box::new(peer))
     }
@@ -495,6 +496,16 @@ impl ProxyHttp for Server {
     {
         ctx.reused = reused;
         ctx.upstream_address = peer.address().to_string();
+        if let Some(value) = ctx.upstream_connect_time {
+            let d = get_hour_duration();
+            let value = if d >= value {
+                d - value
+            } else {
+                d + (3600 * 1000) - value
+            };
+            ctx.upstream_connect_time = Some(value);
+        }
+
         Ok(())
     }
     async fn upstream_request_filter(
diff --git a/src/state/ctx.rs b/src/state/ctx.rs
index 57e3cf91..bed15e1c 100644
--- a/src/state/ctx.rs
+++ b/src/state/ctx.rs
@@ -31,6 +31,7 @@ pub struct State {
     pub request_id: Option<String>,
     pub cache_prefix: Option<String>,
     pub cache_lock_duration: Option<Duration>,
+    pub upstream_connect_time: Option<u32>,
 }
 
 impl Default for State {
@@ -50,6 +51,7 @@ impl Default for State {
             request_id: None,
             cache_prefix: None,
             cache_lock_duration: None,
+            upstream_connect_time: None,
         }
     }
 }