The interesting scenic spots in Thailand include: the Jade Buddha Temple in the Grand Palace, seafood restaurant, online celebrity Du Lala Shuishang, Coral Island, Honeymoon Island, Golden House, Pedestrian Street, Muay Thai, Akasa shemale, Small Train Museum, worship of four gods, elephant riding, Asian night market, beaches, Bangkok, Phuket, Chiang Mai and Pattaya.
If you haven't been to Thailand, Bangkok is a must. It's a typical and national scenic spot. If you want to experience the quiet life of Buddhist countries, I suggest Chiang Mai. If you want to spend a leisure holiday by the sea, you will naturally choose Phuket, with leisurely beach time and quite rich nightlife (generally).
Pattaya is the city that never sleeps. It is the only legal casino in Thailand, the red light district and other places. It is a big casino. As long as you spend money, you can get whatever you want. It is the most distinctive existence in Thailand.
Thailand's tropical weather will make you taste a lot of fresh fruits, but you can't take them back to China (food security problem), but I suggest you buy some dried durian and mangosteen in the local supermarket, which are cheap and delicious, and are more suitable for sending to colleagues.