Day 2: Kunming-Jinghong
Continue driving to Jinghong in the morning. After arriving, you can go to the Central Square of Jinghong City and the Dai Style Garden to experience Dai culture.

Day 3: Jinghong-Menghai
Drive to Menghai and enjoy the beautiful natural scenery. You can go to Menghai National Nature Reserve on foot.

Day 4: Menghai-Xishuangbanna Scenic Area
Continue driving to Xishuangbanna Scenic Area, you can go to the Tropical Botanical Garden to appreciate various exotic tropical plants, and you can also go to the Tropical Rainforest Park to experience the unique charm of nature.

Day 5: Xishuangbanna Scenic Area-Menglian
Continue driving to Menglian County to enjoy the magnificent snowy mountains, explore local ethnic minority villages, and learn about the culture and lifestyle of ethnic minorities.

Day 6: Menglian-Xishuangbanna Scenic Area
Continue to drive to Xishuangbanna Scenic Area, you can go shopping in Jinghong City and enjoy food.
Taste local food and feel the tropical customs.

Day 7: Xishuangbanna Scenic Area-Kunming
Driving back to Kunming in the morning, you can visit Kunming's ancient towns and ancient buildings on the way to experience Yunnan's traditional culture and historical heritage.

Day 8: Kunming-Chongqing
In the morning, I flew back to Chongqing Shuangzi to spread culture and end the self-driving journey.

Summary:
Whether you are starting from Chengdu or Chongqing, visiting Xishuangbanna is a very worth visiting. Whether you are riding or driving yourself, you can deeply experience the tropical customs and natural scenery of Xishuangbanna, learn about ethnic minority culture and history, taste local cuisine, and spend an unforgettable trip.