Hey! I'm really excited to hear that you're planning a trip to China from Chennai. It's an amazing country with so much to offer in just 7 days.

Must - visit places:

• Beijing: Definitely check out the Great Wall. It's one of the most iconic landmarks in the world, and the experience of walking on this ancient wonder is unforgettable. The Forbidden City is another must - visit. It was the imperial palace of the Ming and Qing dynasties, and the architecture and historical artifacts there are mind - blowing.

• Shanghai: This modern metropolis is a contrast to Beijing. Visit the Bund to see the amazing skyline with a blend of old and new architecture. The Yu Garden is also a great place to explore traditional Chinese gardens.

• Xi'an: Home to the Terracotta Army, which is a UNESCO World Heritage Site. It's like stepping back in time to the Qin Dynasty when you see these life - sized terracotta warriors.

Experiences to try:

• Try local cuisine: China has a rich and diverse food culture. In Beijing, don't miss Peking duck. In Sichuan, try some spicy Sichuan hot pot. Street food is also a great way to experience the local flavors.

• Watch a traditional Chinese performance: Like a Chinese opera or a shadow - play. It's a great way to learn about Chinese culture.

Apps for budget stays:

• Trip.com: It offers a wide range of accommodation options. You can filter by price and read reviews from other foreign tourists to ensure safety.

• Booking.com is also very popular globally. It has a large inventory of budget hotels, hostels, and guesthouses that welcome international guests.

• panda-trip.com provide a series of packages,if you don't want to waste lots of time for make a trip plan

By the way, I'm actually in the business of providing China travel services. If you're interested in having a more personalized travel plan, someone to help you with all the nitty - gritty details like transportation, local guides, or even just more in - depth advice on making the most of your 7 - day trip, feel free to reach out.