feat(curriculum): Add A1 Chinese curriculum pinyin practice block (freeCodeCamp#64706)

Co-authored-by: Copilot <[email protected]>

Author: miyaliu666

curriculum/challenges/english/blocks/zh-a1-practice-pinyin/6940554db3c6d9578a853ecf.md

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+---
+id: 69426c637200cb5f98ee2fdc
+title: Task 1
+challengeType: 19
+dashedName: task-1
+lang: zh-CN
+---
+
+<!-- (Audio) Li Hong: ǖ, ě, ù -->
+
+# --instructions--
+
+Listen to the audio and answer the question below.
+
+# --questions--
+
+## --text--
+
+Is it true or false: The letter `i` is in the audio.
+
+## --answers--
+
+True
+
+### --feedback--
+
+The audio only has the single finals `ü`, `e`, and `u`.
+
+---
+
+False
+
+## --video-solution--
+
+2
+
+# --explanation--
+
+The audio says `ǖ`, `ě`, and `ù`. None of these syllables uses the vowel `i`, so the statement is false.
+
+# --scene--
+
+```json
+{
+  "setup": {
+    "background": "living-room.png",
+    "characters": [
+      {
+        "character": "Li Hong",
+        "position": {
+          "x": 50,
+          "y": 15,
+          "z": 1.4
+        },
+        "opacity": 0
+      }
+    ],
+    "audio": {
+      "filename": "ZH_A1_pinyin_practice.mp3",
+      "startTime": 1,
+      "startTimestamp": 1.57,
+      "finishTimestamp": 6.06
+    }
+  },
+  "commands": [
+    {
+      "character": "Li Hong",
+      "opacity": 1,
+      "startTime": 0
+    },
+    {
+      "character": "Li Hong",
+      "startTime": 1,
+      "finishTime": 1.93,
+      "dialogue": {
+        "text": "ǖ",
+        "align": "center"
+      }
+    },
+    {
+      "character": "Li Hong",
+      "startTime": 2.8,
+      "finishTime": 3.74,
+      "dialogue": {
+        "text": "ě",
+        "align": "center"
+      }
+    },
+    {
+      "character": "Li Hong",
+      "startTime": 4.68,
+      "finishTime": 5.49,
+      "dialogue": {
+        "text": "ù",
+        "align": "center"
+      }
+    },
+    {
+      "character": "Li Hong",
+      "opacity": 0,
+      "startTime": 5.99
+    }
+  ]
+}
+```

curriculum/challenges/english/blocks/zh-a1-practice-pinyin/69426c637200cb5f98ee2fdc.md

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+---
+id: 69428238612067fa962eb223
+title: Task 2
+challengeType: 22
+dashedName: task-2
+lang: zh-CN
+inputType: pinyin-tone
+---
+
+<!-- (Audio) Li Hong: bǐ, xǔ, zé, chù -->
+
+# --instructions--
+
+Listen to the audio and complete the sequence of syllables below.
+
+# --fillInTheBlank--
+
+## --sentence--
+
+`BLANK, xǔ, zé, BLANK`
+
+## --blanks--
+
+`bǐ`
+
+### --feedback--
+
+This syllable has the initial `b` and the final `i`, and uses the third tone.
+
+---
+
+`chù`
+
+### --feedback--
+
+This syllable has the initial `ch` and the final `u`, and uses the fourth tone.
+
+# --explanation--
+
+The missing syllables in the sequence are `bǐ` at the beginning and `chù` at the end. They're typed as `bi3` and `chu4`.
+
+# --scene--
+
+```json
+{
+  "setup": {
+    "background": "living-room.png",
+    "characters": [
+      {
+        "character": "Li Hong",
+        "position": {
+          "x": 50,
+          "y": 15,
+          "z": 1.4
+        },
+        "opacity": 0
+      }
+    ],
+    "audio": {
+      "filename": "ZH_A1_pinyin_practice.mp3",
+      "startTime": 1,
+      "startTimestamp": 11,
+      "finishTimestamp": 17.8
+    }
+  },
+  "commands": [
+    {
+      "character": "Li Hong",
+      "opacity": 1,
+      "startTime": 0
+    },
+    {
+      "character": "Li Hong",
+      "startTime": 1,
+      "finishTime": 2.03,
+      "dialogue": {
+        "text": "bǐ",
+        "align": "center"
+      }
+    },
+    {
+      "character": "Li Hong",
+      "startTime": 2.79,
+      "finishTime": 4.05,
+      "dialogue": {
+        "text": "xǔ",
+        "align": "center"
+      }
+    },
+    {
+      "character": "Li Hong",
+      "startTime": 5.13,
+      "finishTime": 6.01,
+      "dialogue": {
+        "text": "zé",
+        "align": "center"
+      }
+    },
+    {
+      "character": "Li Hong",
+      "startTime": 7.01,
+      "finishTime": 7.8,
+      "dialogue": {
+        "text": "chù",
+        "align": "center"
+      }
+    },
+    {
+      "character": "Li Hong",
+      "opacity": 0,
+      "startTime": 8.3
+    }
+  ]
+}
+```