NSKeyedUnarchiver.unarchivedObject has Font issues

ViewController.swift

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var editText: UITextView!
    @IBOutlet weak var showText: UITextView!
    
    var attText: NSMutableAttributedString {
        get {
            let a = NSAttributedString(string: "这是非粗体\n", attributes: [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 16), NSAttributedString.Key.foregroundColor: UIColor.white])
            let b = NSAttributedString(string: "这是粗体\n", attributes: [NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 16), NSAttributedString.Key.foregroundColor: UIColor.white])
            let c = NSAttributedString(string: "这是非粗体\n", attributes: [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 16), NSAttributedString.Key.foregroundColor: UIColor.white])
            
            
            let att = NSMutableAttributedString()
            att.append(a)
            att.append(b)
            att.append(c)
            return att
        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        editText.allowsEditingTextAttributes = true

        if let data = UserDefaults.standard.data(forKey: "AAA") {
            let att = NSAttributedString.fromData(data)
            editText.attributedText = att
            showText.attributedText = att
        } else {
            editText.attributedText = attText
        }
        
    }
    @IBAction func onResetClick(_ sender: UIButton) {
        editText.attributedText = attText
        
    }
    
    @IBAction func onSaveClick(_ sender: UIButton) {
        UserDefaults.standard.set(editText.attributedText.toData(), forKey: "AAA")
        
        if let data = UserDefaults.standard.data(forKey: "AAA") {
            showText.attributedText = NSAttributedString.fromData(data)
        }
    }
    @IBAction func onToDismissKeyboard(_ sender: UITapGestureRecognizer) {
        editText.resignFirstResponder()
        showText.resignFirstResponder()
    }
    
}

extension NSAttributedString {

    func toData() -> Data {
        return try! NSKeyedArchiver.archivedData(withRootObject: self, requiringSecureCoding: true)
    }

    static func fromData(_ data: Data) -> NSAttributedString? {
        //This line of code report this issue:
        //Client requested name ".PingFangSC-Medium", it will get TimesNewRomanPSMT rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[UIFont systemFontOfSize:]
        if let attribute = try? NSKeyedUnarchiver.unarchivedObject(ofClass: NSAttributedString.self, from: data) {
            return attribute
        }
        return nil
    }
}