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+# Brief introduction for using MediaTek released OpenWrt SDK
+
+## 1. Build system setup
+
+- Please refer to https://openwrt.org/docs/guide-developer/toolchain/install-buildsystem
+
+## 2. Clone vanilla OpenWrt
+
+Currently two release branches are supported:
+
+1. 21.02
+    This is the current in-use branch
+
+   ```bash
+   git clone -b openwrt-21.02 https://git.openwrt.org/openwrt/openwrt.git
+   ```
+
+2. master (will be 24.0x branch later)
+   The next version in development
+
+   ```bash
+   git clone https://git.openwrt.org/openwrt/openwrt.git
+   ```
+
+## 3. Add MediaTek OpenWrt feed
+
+```bash
+cd openwrt
+echo "src-git mtk_openwrt_feed https://git01.mediatek.com/openwrt/feeds/mtk-openwrt-feeds" >> feeds.conf.default
+./scripts/feeds update -a
+./scripts/feeds install -a
+```
+
+## 4. Apply MediaTek OpenWrt files and patches
+
+1. 21.02 branch
+
+   ```bash
+   cp -af ./feeds/mtk_openwrt_feed/21.02/files/* .
+   cp -af ./feeds/mtk_openwrt_feed/tools .
+   for file in $(find ./feeds/mtk_openwrt_feed/21.02/patches-base -name "*.patch" | sort); do patch -f -p1 -i ${file}; done
+   for file in $(find ./feeds/mtk_openwrt_feed/21.02/patches-feeds -name "*.patch" | sort); do patch -f -p1 -i ${file}; done
+   ```
+
+2. master branch
+
+   ```bash
+   cp -af ./feeds/mtk_openwrt_feed/master/files/* .
+   for file in $(find ./feeds/mtk_openwrt_feed/master/patches-base -name "*.patch" | sort); do patch -f -p1 -i ${file}; done
+   ```
+
+## 5. Configuration
+
+```bash
+make menuconfig
+```
+
+1. 21.02 branch
+
+   ```text
+   Target System -> MediaTek Ralink ARM
+   Subtarget -> MT7981 / MT7986 / MT7988
+   Target Profile -> select as needed
+   ```
+
+2. master branch
+
+   ```text
+   Target System -> MediaTek Ralink ARM
+   Subtarget -> Filogic 8x0 (MT798x)
+   Target Profile -> select as needed
+   ```
+
+## 6. Build
+
+```bash
+make V=s -j$(nproc)
+```