diff --git a/.vitepress/config.theme.ts b/.vitepress/config.theme.ts
index 72fab84..25e07d5 100644
--- a/.vitepress/config.theme.ts
+++ b/.vitepress/config.theme.ts
@@ -14,7 +14,7 @@ export default {
   },
   footer: {
     message: 'All original contents are licensed under <a href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.',
-    copyright: `Copyright © 2019-${new Date().getFullYear()} <a href="https://github.com/Octobug">Octobug</a>`,
+    copyright: `Copyright ©️ 2019-${new Date().getFullYear()} <a href="https://github.com/Octobug">Octobug</a>`,
   },
   lastUpdated: {
     formatOptions: {
diff --git a/posts/an-https-issue-on-adas/README.md b/posts/an-https-issue-on-adas/README.md
index dd93652..02d1cea 100644
--- a/posts/an-https-issue-on-adas/README.md
+++ b/posts/an-https-issue-on-adas/README.md
@@ -11,11 +11,7 @@ tags:
 
 # 一次 ADAS 设备上的 HTTPS 排障过程
 
-:::info
-I'm requesting permission to use the copyrighted content.
-:::
-
-<!-- ![Spinner Dolphin](../../temp/long-snouted-spinner-dolphin-spin-cycle.jpg "Used with permission from *[wildandwonderful.org]([wildandwonderful.org](https://www.wildandwonderful.org/))*.") -->
+![Spinner Dolphin](./spinner-dolphin.gif "Permitted under [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/). ©️ [**Dennis Rabeling**](https://www.inaturalist.org/people/dennisthediver). [*inaturalist.org*](https://www.inaturalist.org/photos/177838721).")
 
 > 有一批设备总是软件升级失败，你看一下是怎么回事？
 
@@ -374,9 +370,12 @@ SSL 协议相当复杂，哪怕只是配置使用证书也很容易出问题。
 
 ---
 
-::: details 是海豚就转！
+::: details 是海豚就转
+
+封面图是一只海豚旋转跳跃出水面。
+
+这种海豚叫长吻飞旋海豚 (Spinner Dolphin) [[14]]，因喜欢飞跃出水面旋转而得名。
 
-封面图 [[14]] 是**一只**海豚跳跃出水面旋转的全过程合成图，这种海豚叫飞旋海豚 (Spinner Dolphin) [[15]]。
 :::
 
 ## References
@@ -394,8 +393,7 @@ SSL 协议相当复杂，哪怕只是配置使用证书也很容易出问题。
 11. [TCP handshake][11]. *developer.mozilla.org*.
 12. [RFC 793 (TRANSMISSION CONTROL PROTOCOL) - 3.4. Establishing a connection][12]. *datatracker.ietf.org*.
 13. [RFC 5246 (The Transport Layer Security (TLS) Protocol Version 1.2) - 7.3. Handshake Protocol Overview][13]. *datatracker.ietf.org*.
-14. [Ocean Wildlife: Spinner Dolphins][14]. *wildandwonderful.org*.
-15. [Spinner dolphin][15]. *en.wikipedia.org*.
+14. [Spinner dolphin][14]. *en.wikipedia.org*.
 
 [1]: <https://en.wikipedia.org/wiki/Advanced_driver-assistance_system>
 [2]: <https://en.wikipedia.org/wiki/Certificate_authority#Issuing_a_certificate>
@@ -410,5 +408,4 @@ SSL 协议相当复杂，哪怕只是配置使用证书也很容易出问题。
 [11]: <https://developer.mozilla.org/en-US/docs/Glossary/TCP_handshake>
 [12]: <https://datatracker.ietf.org/doc/html/rfc793#section-3.4>
 [13]: <https://datatracker.ietf.org/doc/html/rfc5246#section-7.3>
-[14]: <https://www.wildandwonderful.org/spinner-dolphins>
-[15]: <https://en.wikipedia.org/wiki/Spinner_dolphin>
+[14]: <https://en.wikipedia.org/wiki/Spinner_dolphin>
diff --git a/posts/an-https-issue-on-adas/spinner-dolphin.gif b/posts/an-https-issue-on-adas/spinner-dolphin.gif
new file mode 100644
index 0000000..d0215c9
Binary files /dev/null and b/posts/an-https-issue-on-adas/spinner-dolphin.gif differ
diff --git a/posts/non-original-content-copyright-issues/README.md b/posts/non-original-content-copyright-issues/README.md
index 14edb2c..68f6f0c 100644
--- a/posts/non-original-content-copyright-issues/README.md
+++ b/posts/non-original-content-copyright-issues/README.md
@@ -9,7 +9,7 @@ tags:
 
 # 公开使用非原创内容的版权问题
 
-![Baiji Qiqi](./baiji-qiqi.jpg "Used with permission: ***Roland Seitre***. [*commons.wikimedia.org*](https://commons.wikimedia.org/w/index.php?curid=95653143). [CC BY-SA 3.0](https://creativecommons.org/licenses/by/3.0/).")
+![Baiji Qiqi](./baiji-qiqi.jpg "Permitted under [CC BY-SA 3.0](https://creativecommons.org/licenses/by/3.0/). ©️ **Roland Seitre**. [*commons.wikimedia.org*](https://commons.wikimedia.org/w/index.php?curid=95653143).")
 
 前不久写本站第一篇文章时随手配了一张通过 Google 搜到的图片，越看越喜欢，所以决定尽量给每一篇文章配个封面图。
 
@@ -123,7 +123,7 @@ Powered by creators everywhere.
 
 :::details 封面图
 
-本站第一张经过许可的封面图是一只名为“淇淇” [[3]] 的雄性白鱀豚 (Baiji) [[4]]，死于 2002 年 7 月 14 日。淇淇是最后的确切的白𬶨豚活体记录，目前国际学界普遍认为白鱀豚已经功能性灭绝 [[4]]。
+本站第一张拥有许可的封面图是一只名为“淇淇” [[3]] 的雄性白鱀豚 (Baiji) [[4]]，死于 2002 年 7 月 14 日。淇淇是最后的确切的白𬶨豚活体记录，目前国际学界普遍认为白鱀豚已经功能性灭绝 [[4]]。
 
 :::
 
diff --git a/posts/pilot/README.md b/posts/pilot/README.md
index 20f6938..dc6202f 100644
--- a/posts/pilot/README.md
+++ b/posts/pilot/README.md
@@ -10,11 +10,7 @@ tags:
 
 # Pilot
 
-:::info
-I'm requesting permission to use the copyrighted content.
-:::
-
-<!-- ![Pilot Whale](../../temp/pilot-whale.jpg "Used with permission from *[sdmdiving.com](https://sdmdiving.com)*.") -->
+![Pilot Whale](./pilot-whale.jpg "Permitted under [CC BY 2.0](https://creativecommons.org/licenses/by/2.0/) (image resized). ©️ [**Christopher Michel**](https://www.flickr.com/photos/cmichel67/). [*flickr.com*](https://www.flickr.com/photos/cmichel67/47539866471/in/photolist-REw454-2fqWf7k-REw4ex-2fmgKwf-REw42P-2fqWf3c-2ejZmEG).")
 
 为了让这篇成为博客的第一篇文章，我写了个假日期。这个日期是我从珠海搬到深圳的日子，算是一个新的开始。
 
@@ -57,7 +53,7 @@ I'm requesting permission to use the copyrighted content.
 ::: details Pilot?
 
 - "Pilot" 经常被用作剧集第一集的名字 [[1],[2]]，中文可以译为“试播集”。
-- 封面图 [[3]] 中的鲸鱼是领航鲸 (Pilot Whale) [[4]]。
+- 封面图中的鲸鱼是领航鲸 (Pilot Whale) [[3]]，由作者摄于斯里兰卡 [[4]]。
 
 :::
 
@@ -65,10 +61,10 @@ I'm requesting permission to use the copyrighted content.
 
 1. [Television pilot][1]. *en.wikipedia.org*.
 2. [List of television episodes titled Pilot][2]. *en.wikipedia.org*.
-3. [Days Like Today Are Why I Want to Live Forever!][3]. *sdmdiving.com*.
-4. [Pilot whale][4]. *en.wikipedia.org*.
+3. [Pilot whale][3]. *en.wikipedia.org*.
+4. [Sri Lanka][4]. *en.wikipedia.org*.
 
 [1]: <https://en.wikipedia.org/wiki/Television_pilot>
 [2]: <https://en.wikipedia.org/wiki/List_of_television_episodes_titled_Pilot>
-[3]: <https://sdmdiving.com/wildlife-travel-blog/tag/pilot+whale+diving>
-[4]: <https://en.wikipedia.org/wiki/Pilot_whale>
+[3]: <https://en.wikipedia.org/wiki/Pilot_whale>
+[4]: <https://en.wikipedia.org/wiki/Sri_Lanka>
diff --git a/posts/pilot/pilot-whale.jpg b/posts/pilot/pilot-whale.jpg
new file mode 100644
index 0000000..095fa8a
Binary files /dev/null and b/posts/pilot/pilot-whale.jpg differ