"I've got a lot to worry about as a new Airbnb host. But I'm willing to learn," he says.

"For example, can they find the place? Are they enjoying their stay?"

He's happy to share local travel tips with visitors.

"First-time visitors' agendas are topped by scenic spots and historical sites. I recommend they stroll along the hutong to encounter locals," he says.

"Observation is the secret to making your trip less formulaic. A hutong provides a different lifestyle than a downtown hotel."

Gu knows the best eateries, ranging from locals' favorites to Western restaurants, hidden in zigzagging hutong.

He has stayed in many Airbnb homes during his travels.

"So, I also do my best to ensure guests enjoy what I offer," he says.

He recently stayed in an elegant century-old palace owned by an eminent family in Fez, Morocco. It was tastefully decorated with colored glass, crystal and handmade mosaic tiles. Airbnb guests' fees are used for its upkeep.

"You can have a spectacular experience there. And it's not expensive," he says.

"It's challenging for the family's descendants to maintain such a spacious palace."

He recalls his early years as a traveler.

"It's hard at first. You don't know what will happen. You might get sick or robbed."

But his memories of those journeys are mostly fond.

"I collect travel experiences like some people collect shoes," he says.

"Travel shows me the possibilities within myself, such as my connection with the world. The books you've read, the people you've known and the places you've been gradually shape your way of thinking."