HarmonyOS 剪贴板只能剪切数字。 英文、中文、符号等都剪切不进去，有什么办法剪切所有的吗

代码如下所示：

// 复制文本框文本到剪贴板
let plainTextData = new unifiedDataChannel.UnifiedData();
let plainText = new unifiedDataChannel.PlainText();
plainText.details = {
  key: 'delayPlaintext',
  value: 'a3123ser--',
};
plainText.textContent = 'a额3123ser--';
plainText.abstract = 'delayTextContent';
plainTextData.addRecord(plainText);

let systemPasteboard: pasteboard.SystemPasteboard = pasteboard.getSystemPasteboard();
systemPasteboard.setUnifiedData(plainTextData).then((data: void) => {
  console.info('Succeeded in setting UnifiedData.');
}).catch((err: BusinessError) => {
  console.error('Failed to set UnifiedData. Cause: ' + err.message);
});