update README

README.md

 # rCore-Tutorial-v3
-rCore-Tutorial version 3.5. See the [Documentation in Chinese](https://rcore-os.github.io/rCore-Tutorial-Book-v3/).
+rCore-Tutorial version 3.6. See the [Documentation in Chinese](https://rcore-os.github.io/rCore-Tutorial-Book-v3/).
 
 rCore-Tutorial API Docs.  See the [API Docs of Ten OSes ](#OS-API-DOCS)
 
@@ -8,7 +8,7 @@ If you don't know  Rust Language and try to learn it, please visit [Rust Learnin
 Official QQ group number: 735045051
 
 ## news
-- 25/01/2022: Version 3.6.0 is on the way! Now we directly update the code on chX branches, please periodically check if there are any updates.
+- 23/06/2022: Version 3.6.0 is on the way! Now we directly update the code on chX branches, please periodically check if there are any updates.
 
 ## Overview
 
@@ -44,7 +44,7 @@ $ rustup component add rust-src
 
 ### Install Qemu
 
-Here we manually compile and install Qemu 5.0.0. For example, on Ubuntu 18.04:
+Here we manually compile and install Qemu 7.0.0. For example, on Ubuntu 18.04:
 
 ```sh
 # install dependency packages
@@ -52,10 +52,10 @@ $ sudo apt install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev l
               gawk build-essential bison flex texinfo gperf libtool patchutils bc \
               zlib1g-dev libexpat-dev pkg-config  libglib2.0-dev libpixman-1-dev git tmux python3 python3-pip
 # download Qemu source code
-$ wget https://download.qemu.org/qemu-5.0.0.tar.xz
-# extract to qemu-5.0.0/
-$ tar xvJf qemu-5.0.0.tar.xz
-$ cd qemu-5.0.0
+$ wget https://download.qemu.org/qemu-7.0.0.tar.xz
+# extract to qemu-7.0.0/
+$ tar xvJf qemu-7.0.0.tar.xz
+$ cd qemu-7.0.0
 # build
 $ ./configure --target-list=riscv64-softmmu,riscv64-linux-user
 $ make -j$(nproc)
@@ -64,9 +64,9 @@ $ make -j$(nproc)
 Then, add following contents to `~/.bashrc`(please adjust these paths according to your environment):
 
 ```
-export PATH=$PATH:/home/shinbokuow/Downloads/built/qemu-5.0.0
-export PATH=$PATH:/home/shinbokuow/Downloads/built/qemu-5.0.0/riscv64-softmmu
-export PATH=$PATH:/home/shinbokuow/Downloads/built/qemu-5.0.0/riscv64-linux-user
+export PATH=$PATH:/home/shinbokuow/Downloads/built/qemu-7.0.0
+export PATH=$PATH:/home/shinbokuow/Downloads/built/qemu-7.0.0/riscv64-softmmu
+export PATH=$PATH:/home/shinbokuow/Downloads/built/qemu-7.0.0/riscv64-linux-user
 ```
 
 Finally, update the current shell:
@@ -79,7 +79,7 @@ Now we can check the version of Qemu:
 
 ```sh
 $ qemu-system-riscv64 --version
-QEMU emulator version 5.0.0
+QEMU emulator version 7.0.0
 Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
 ```
 
@@ -251,13 +251,9 @@ The API Docs for Ten OS
 
 ## Working in progress
 
-Our first release 3.5.0 (chapter 1-7) has been published.
+Our first release 3.6.0 (chapter 1-9) has been published, and we are still working on it.
 
-There will be 9 chapters in our next release 3.6.0, where 2 new chapters will be added:
-* chapter 8: synchronization on a uniprocessor
-* chapter 9: I/O devices
-
-Current version is 3.6.0-alpha.1 and we are still working on it.
+* chapter 9: need more descripts about different I/O devices
 
 Here are the updates since 3.5.0:
 
@@ -279,18 +275,16 @@ Here are the updates since 3.5.0:
 * [x] switch the code of chapter 6 and chapter 7
 * [x] support signal mechanism in chapter 7/8(only works for apps with a single thread)
 * [x] Add boards/ directory and support rustdoc, for example you can use `cargo doc --no-deps --open` to view the documentation of a crate
-
+* [x] code of chapter 9: device drivers based on interrupts, including UART, block, keyboard, mouse, gpu devices
+* [x] add CI autotest and doc in github 
 ### Todo(High priority)
 
-* [ ] review documentation, current progress: 5/9
-* [ ] support user-level sync primitives in chapter 8
-* [ ] code of chapter 9: device drivers based on interrupts, including UART and block devices
+* [ ] review documentation, current progress: 8/9
 * [ ] use old fs image optionally, do not always rebuild the image
-* [ ] add new system calls: getdents64/fstat
 * [ ] shell functionality improvement(to be continued...)
 * [ ] give every non-zero process exit code an unique and clear error type
 * [ ] effective error handling of mm module
-
+* [ ] add more os functions for understanding os conecpts and principles
 ### Todo(Low priority)
 
 * [ ] rewrite practice doc and remove some inproper questions