diff --git a/_demo/embed/hello-esp32/main.go b/_demo/embed/esp32/hello/main.go
similarity index 100%
rename from _demo/embed/hello-esp32/main.go
rename to _demo/embed/esp32/hello/main.go
diff --git a/_demo/embed/hello-esp32/uart.go b/_demo/embed/esp32/hello/uart.go
similarity index 100%
rename from _demo/embed/hello-esp32/uart.go
rename to _demo/embed/esp32/hello/uart.go
diff --git a/_embdemo/esp32/libc/main.go b/_demo/embed/esp32/libc/main.go
similarity index 99%
rename from _embdemo/esp32/libc/main.go
rename to _demo/embed/esp32/libc/main.go
index 297373c3..bb3cfd02 100644
--- a/_embdemo/esp32/libc/main.go
+++ b/_demo/embed/esp32/libc/main.go
@@ -4,7 +4,7 @@ import (
 	"unsafe"
 
 	"github.com/goplus/lib/c"
-	"github.com/goplus/llgo/_embdemo/esp32/watchdog"
+	"github.com/goplus/llgo/_demo/embed/esp32/watchdog"
 )
 
 //
diff --git a/_embdemo/esp32/rt/main.go b/_demo/embed/esp32/rt/main.go
similarity index 99%
rename from _embdemo/esp32/rt/main.go
rename to _demo/embed/esp32/rt/main.go
index dfd426de..bdd98bfd 100644
--- a/_embdemo/esp32/rt/main.go
+++ b/_demo/embed/esp32/rt/main.go
@@ -3,7 +3,7 @@ package main
 import (
 	_ "unsafe"
 
-	"github.com/goplus/llgo/_embdemo/esp32/watchdog"
+	"github.com/goplus/llgo/_demo/embed/esp32/watchdog"
 )
 
 //
@@ -278,7 +278,7 @@ func testMultiplicationFunctions() {
 
 	// Test muldi3 - signed 64-bit multiplication
 	assertEqualInt64("muldi3", muldi3(5, 4), 20)
-	assertEqualInt64("mul极3", muldi3(-5, 4), -20)
+	assertEqualInt64("muldi3", muldi3(-5, 4), -20)
 	assertEqualInt64("muldi3", muldi3(5, -4), -20)
 
 	// Test muldf3 - double precision multiplication
diff --git a/_embdemo/esp32/watchdog/watchdog.go b/_demo/embed/esp32/watchdog/watchdog.go
similarity index 100%
rename from _embdemo/esp32/watchdog/watchdog.go
rename to _demo/embed/esp32/watchdog/watchdog.go
diff --git a/_demo/embed/write-esp32/main.go b/_demo/embed/esp32/write/main.go
similarity index 100%
rename from _demo/embed/write-esp32/main.go
rename to _demo/embed/esp32/write/main.go