Applying for China Travel Visa Without an Invitation Letter - US Citizen, applying in Lagos

Good day,
Im planning a DIY trip to China (Guangzhou) & Asia (Thailand) - sponsored by me. Assuming I don't know any one in either of these places to legally provide a letter of invite, Is it possible to submit a full itinerary(s) instead of an official invitation letter for the visa application?

Eg. A round-trip ticket from your home country to China and back / Hotel booking reservations during the window of your flight itinerary/ Bank statement showing proof of funds and so on.