Create a detailed travel itinerary in HTML format

    <div class="day">
        <div class="sub-header">Day 1: Arrival in Changchun</div>
        <p><strong>Flight:</strong> ${flightDetails}</p>
        <p><strong>Hotel:</strong> ${hotelName} - Located in city center, comfortable and affordable</p>
        <p><strong>Weather:</strong> ${weatherForecast}</p>
        <p><strong>Packing Tips:</strong> ${packingRecommendations}</p>
    </div>

    <div class="day">
        <div class="sub-header">Day 2: Exploring Changchun</div>
        <p><strong>Attractions:</strong> ${attraction1} (Ticket: ${ticketPrice1}, Open: ${openTime1})</p>
        <p><strong>Lunch:</strong> Try local cuisine at ${restaurant1}</p>
        <p><strong>Afternoon:</strong> Visit ${attraction2} (Ticket: ${ticketPrice2}, Open: ${openTime2})</p>
        <p><strong>Dinner:</strong> Enjoy a meal at ${restaurant2}</p>
        <p><strong>Transportation:</strong> ${transportDetails}</p>
    </div>

    <!-- Repeat similar blocks for Day 3, Day 4, etc. -->
    
    <div class="day">
        <div class="sub-header">Day 5: Departure</div>
        <p><strong>Return Flight:</strong> ${returnFlightDetails}</p>
    </div>

</div>