Is 5-6 days enough for eating, drinking, and playing in Chaozhou, Shantou, and Jieyang by high-speed rail from Hong Kong? How should I travel?

Taking the high-speed rail from Hong Kong to Chaozhou, Shantou, and Jieyang, is 5-6 days enough for eating, drinking, and entertainment? How should I travel? Is 5-6 days enough? Where should I stay near the food street? (4-5-star hotel) Which delicacies must be tried? Which one is the tastiest? Thank you.
Get off at the High-Speed Railway Chaoshan Station, take a taxi to the Chaozhou Ancient City, about 70 yuan, stay at a guesthouse inside the ancient city, spend two nights in the Chaozhou Ancient City, arrive at Nanao Island on the third day, stay for one night, visit the Xiaogongyuan in the city of Shantou on the fourth day, visit the Chaozhou Museum, on the fifth day go to Jieyang, there are not many attractions in Jieyang, but you can also take a stroll around.
Take the high-speed rail to Chaozhou Chaoshan Station, take a taxi to Chaozhou Ancient City, approximately 70 yuan, stay at an inn inside the ancient city, spend two nights in Chaozhou Ancient City, arrive at Nan’ao Island on the third day, stay for one night, visit the Xiaogongyuan in the city of Shantou on the fourth day, visit the Chaozhou Museum, and on the fifth day, go to Jieyang. There are not many attractions in Jieyang, but it can also be explored.