diff --git a/CHANGELOG.md b/CHANGELOG.md
index 882c302..0dcc56a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - EEPROM dump support, fix #12
 - Refactor all subcommands, using clap v4
 - Probe support, multiple chips can be selected by an index
+- Progressbar for flash and verify commands
+
 ### Changed
 - Disable debug log by default
 
diff --git a/Cargo.toml b/Cargo.toml
index 75c4b32..b555582 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,3 +37,4 @@ object = { version = "0.29", default-features = false, features = [
     "read_core",
     "std",
 ] }
+indicatif = "0.17"
\ No newline at end of file
diff --git a/README.md b/README.md
index 3f6dc11..6260a53 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,8 @@ This tool should work on most WCH MCU chips. But I haven't tested it on any othe
 - [x] CH32F103
 - [x] CH582
   - CH58xM-EVT
+- [x] CH559
+  - CH559TL_MINIEVT_V20 by wch.cn
 - [x] CH32V203
   - [CH32V203G6 FlappyBoard](https://github.com/metro94/FlappyBoard)
 - ... (feel free to open an issue whether it works on your chip or not)
diff --git a/src/flashing.rs b/src/flashing.rs
index 90450b0..2205c7c 100644
--- a/src/flashing.rs
+++ b/src/flashing.rs
@@ -1,8 +1,6 @@
 //! Chip flashing routine
-use std::thread::sleep;
-use std::time::Duration;
-
 use anyhow::Result;
+use indicatif::ProgressBar;
 use scroll::{Pread, Pwrite, LE};
 
 use crate::{
@@ -202,12 +200,16 @@ impl<T: Transport> Flashing<T> {
 
         const CHUNK: usize = 56;
         let mut address = 0x0;
+
+        let bar = ProgressBar::new(raw.len() as _);
         for ch in raw.chunks(CHUNK) {
             self.flash_chunk(address, ch, key)?;
             address += ch.len() as u32;
+            bar.inc(ch.len() as _);
         }
         // NOTE: require a write action of empty data for success flashing
         self.flash_chunk(address, &[], key)?;
+        bar.finish();
 
         log::info!("Code flash {} bytes written", address);
 
@@ -215,8 +217,6 @@ impl<T: Transport> Flashing<T> {
     }
 
     pub fn verify(&mut self, raw: &[u8]) -> Result<()> {
-        sleep(Duration::from_secs(1));
-
         let key = self.xor_key();
         let key_checksum = key.iter().fold(0_u8, |acc, &x| acc.overflowing_add(x).0);
         // NOTE: use all-zero key seed for now.
@@ -227,10 +227,13 @@ impl<T: Transport> Flashing<T> {
 
         const CHUNK: usize = 56;
         let mut address = 0x0;
+        let bar = ProgressBar::new(raw.len() as _);
         for ch in raw.chunks(CHUNK) {
             self.verify_chunk(address, ch, key)?;
             address += ch.len() as u32;
+            bar.inc(ch.len() as _);
         }
+        bar.finish();
 
         Ok(())
     }
@@ -270,6 +273,8 @@ impl<T: Transport> Flashing<T> {
         if self.chip.eeprom_size == 0 {
             anyhow::bail!("Chip does not support EEPROM");
         }
+        let bar = ProgressBar::new(self.chip.eeprom_size as _);
+
         let mut ret: Vec<u8> = Vec::with_capacity(self.chip.eeprom_size as _);
         let mut address = 0x0;
         while address < self.chip.eeprom_size as u32 {
@@ -278,7 +283,7 @@ impl<T: Transport> Flashing<T> {
             let cmd = Command::data_read(address, chunk_size);
             let resp = self.transport.transfer(cmd)?;
             anyhow::ensure!(resp.is_ok(), "data_read failed");
-            address += CHUNK as u32;
+
             anyhow::ensure!(
                 resp.payload()[2..].len() == chunk_size as usize,
                 "data_read length mismatch"
@@ -287,7 +292,11 @@ impl<T: Transport> Flashing<T> {
                 anyhow::bail!("EEPROM read failed, required chunk size cannot be satisfied");
             }
             ret.extend_from_slice(&resp.payload()[2..]);
+            address += chunk_size as u32;
+
+            bar.inc(chunk_size as _);
             if chunk_size < CHUNK as u16 {
+                bar.finish();
                 break;
             }
         }
diff --git a/src/main.rs b/src/main.rs
index e4242ee..c978c5a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -175,6 +175,7 @@ fn main() -> Result<()> {
                 log::info!("Erase done");
             }
 
+            log::info!("Writing to code flash...");
             flashing.flash(&binary)?;
             sleep(Duration::from_millis(500));
 
@@ -210,6 +211,7 @@ fn main() -> Result<()> {
                     flashing.reidenfity()?;
 
                     sleep(Duration::from_millis(500));
+                    log::info!("Reading EEPROM...");
 
                     let eeprom = flashing.dump_eeprom()?;
                     log::info!("EEPROM data size: {}", eeprom.len());