Absolutely! I'd be glad to help you plan your trip to Quanzhou, Guangzhou, and Hong Kong.

Best Time to Visit:
For Quanzhou and Guangzhou, the mild and humid months are the best period which is from April to November. However, avoid the typhoon season from July to September. The best time to visit Hong Kong is from October to December when the weather is pleasant.

Route and Accessibility:
To travel between Quanzhou, Guangzhou, and Hong Kong, you can take high-speed trains or flights. Trains run daily from Quanzhou to Guangzhou. From Guangzhou to Hong Kong, you can take the high-speed train or bus.

Altitude and Acclimatization:
These cities are not located at high altitudes, so acclimatization is not a concern. However, prepare yourself for humidity in both Guangzhou and Hong Kong.

Accommodation and Booking:
Both cities offer a wide range of accommodations from budget to luxury hotels. It is advisable to book in advance, particularly during major festivals or events.

Clothing and Essentials:
Bring lightweight, breathable clothing because of the humid weather. Always have an umbrella or raincoat with you due to sudden downpours. Don't forget your sunscreen!

Health and Safety:
In case of a medical emergency, there are plenty of hospitals in these cities. Always remember to have travel insurance. Drink bottled water to avoid any possible stomach upset.

Local Etiquette and Respect:
Chinese culture greatly respects modesty and manners. Avoid loud conversations and respect the local customs. In Hong Kong, it is customary to receive and give things with both hands.