Best moments
Oolong is the most adaptable tea for an occasion, because it has three registers.
A green style oolong suits the same daytime moments a green tea does.
A medium roast suits an afternoon with food, which is the Cantonese default.
Dim sum and oolong are effectively a single institution.
A heavy roast suits a winter evening and a long table.
Gongfu service turns any of them into an event of their own.
A 7 g dose in a 110 ml gaiwan produces 8 or more short steeps, which fills an hour easily.
That makes it the best tea for a session where the tea is the activity.
It also works as background, which a delicate green does not.
Business meetings across Fujian and Guangdong run on it for that reason.
It pours well for guests, because it stays drinkable as it cools.
Very few teas survive neglect as gracefully.
It is the safest tea to put in front of a mixed table, since almost everyone finds something in it.
That range is the reason it turns up at both weddings and weekday lunches.
Less ideal moments
The off-times are narrower here than anywhere else, and they still exist.
A heavy roast is wrong on a hot afternoon, where it reads as thick and tiring.
A green style oolong is wrong on a cold evening, where it reads as thin.
Spicy food defeats both, and chilli is the common factor.
A dessert table flattens the finish, which is the best part of a roasted oolong.
A very large group is a practical problem, since gongfu service does not scale.
Serving 12 people properly from one gaiwan is not realistic.
Use a pot in that case and accept a simpler cup.
A tasting with wine before it will ruin the first two steeps.
An occasion where nobody wants to be served is the wrong one for gongfu.
That format requires someone to stay at the table, and not every setting allows it.
Know which version you have before choosing the moment.
An occasion with no table is the awkward one, because gongfu service needs somewhere to put things down.
Standing receptions defeat the format, and a pot left in the corner will not fix that.
Setting it up
Setting up an oolong means choosing between two formats.
Gongfu service, with a gaiwan and small cups, makes the tea the event.
It produces 8 to 12 steeps and needs someone pouring throughout.
Western service, with one pot and larger cups, makes it a table drink.
Both are correct, and mixing them produces the worst of each.
Water should be at 95 °C for a roast and 90 for a green style oolong.
Leaf quantity follows the vessel: 7 g for a 110 ml gaiwan, 5 g for a 300 ml pot.
Preheat everything, since a cold vessel costs the first steep entirely.
Steep times should be short and repeated rather than long and single.
Twenty seconds is a reasonable starting point for the first infusion.
Keep a timer visible, because counting in your head fails by the fourth steep.
The setting then does the rest.
Keep a waste bowl beside the gaiwan, since the leaf needs somewhere to go between steeps.
Pour into a jug first, so every cup in the round tastes the same.
Food around it
Food around an oolong should follow the roast.
A green style oolong wants the same light plate a green tea wants.
A medium roast wants dim sum, which is what it usually gets.
A heavy roast wants roasted meat, nuts and anything with some fat.
Char siu and roast goose are the Cantonese answers for good reason.
Sweet things work at the roasted end, and caramel is the obvious match.
Fresh fruit is risky across the category, since acidity hits the green end.
Serve the food between steeps rather than alongside the first cup.
The first two infusions should be tasted alone.
Keep the table going as long as the tea does, which is usually longer.
Specific pairings are in the food notes for this category.
The plate only needs to be in the same weight class as the roast.
Salty food works better than sweet at the lighter end of the category.
Anything pickled sits well beside a medium roast, which is a habit worth copying.