diff --git a/lichuang_pcb/.gitignore b/lichuang_pcb/.gitignore
new file mode 100644
index 0000000..e62910d
--- /dev/null
+++ b/lichuang_pcb/.gitignore
@@ -0,0 +1,2 @@
+
+*_backup/
diff --git a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-16-42.zip b/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-16-42.zip
deleted file mode 100644
index ea88201..0000000
Binary files a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-16-42.zip and /dev/null differ
diff --git a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-17-42.zip b/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-17-42.zip
deleted file mode 100644
index cb04e21..0000000
Binary files a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-17-42.zip and /dev/null differ
diff --git a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-18-42.zip b/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-18-42.zip
deleted file mode 100644
index d8f29ff..0000000
Binary files a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-18-42.zip and /dev/null differ
diff --git a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-19-42.zip b/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-19-42.zip
deleted file mode 100644
index 83d2ffd..0000000
Binary files a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-19-42.zip and /dev/null differ
diff --git a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-20-42.zip b/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-20-42.zip
deleted file mode 100644
index 4466476..0000000
Binary files a/lichuang_pcb/lichuang_eda_backup/0479bf1a67ad4edf8500d68384afc477/lichuang_eda_2025-12-15-20-42.zip and /dev/null differ