diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 68ced4f..4402790 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [14.x, 16.x]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/src/globalState.ts b/src/globalState.ts
index 6e47cf3..d2709cd 100644
--- a/src/globalState.ts
+++ b/src/globalState.ts
@@ -20,6 +20,10 @@ function emitGlobal(state: Record<string, any>, prevState: Record<string, any>)
 }
 
 export function initGlobalState(state: Record<string, any> = {}) {
+  if (process.env.NODE_ENV === 'development') {
+    console.warn(`[qiankun] globalState tools will be removed in 3.0, pls don't use it!`);
+  }
+
   if (state === globalState) {
     console.warn('[qiankun] state has not changed！');
   } else {
diff --git a/src/loader.ts b/src/loader.ts
index 828c7f0..0363017 100644
--- a/src/loader.ts
+++ b/src/loader.ts
@@ -156,8 +156,8 @@ function getRender(appName: string, appContent: string, legacyRender?: HTMLConte
   const render: ElementRender = ({ element, loading, container }, phase) => {
     if (legacyRender) {
       if (process.env.NODE_ENV === 'development') {
-        console.warn(
-          '[qiankun] Custom rendering function is deprecated, you can use the container element setting instead!',
+        console.error(
+          '[qiankun] Custom rendering function is deprecated and will be removed in 3.0, you can use the container element setting instead!',
         );
       }
 
@@ -275,6 +275,13 @@ export async function loadApp<T extends ObjectType>(
   const appContent = getDefaultTplWrapper(appInstanceId, appName)(template);
 
   const strictStyleIsolation = typeof sandbox === 'object' && !!sandbox.strictStyleIsolation;
+
+  if (process.env.NODE_ENV === 'development' && strictStyleIsolation) {
+    console.warn(
+      "[qiankun] strictStyleIsolation configuration will be removed in 3.0, pls don't depend on it or use experimentalStyleIsolation instead!",
+    );
+  }
+
   const scopedCSS = isEnableScopedCSS(sandbox);
   let initialAppWrapperElement: HTMLElement | null = createElement(
     appContent,