What the name means
TeaHQ's own reading of well-attested general knowledge, with no single source behind it.
Gongfu (工夫) here means something closer to skill acquired through effort than to martial arts, and gongfu cha is usually rendered as making tea with care and attention. The phrase describes an approach rather than a fixed liturgy: the same words cover a Chaozhou family's daily habit and a formal presentation for guests.
How it is done in practice
A description of something people do now, compiled from published accounts rather than from practice.
A small vessel — commonly a gaiwan of around 100-150 ml, or a small Yixing pot — is filled generously with leaf, often a fifth to a third of its volume. Water at the temperature the tea calls for is poured in, and after a short steep the liquor is poured off completely, usually into a serving pitcher and then into small cups. The leaf is infused again and again, with the steeping time extended as it gives out. Because the leaf never sits in water, the drinker gets a sequence of distinctly different cups rather than a single averaged one.
How much of this is fixed
TeaHQ's own reading of well-attested general knowledge, with no single source behind it.
Rather little. Vessel choice, whether a rinse is used, cup size, the order of pouring and the degree of formality all vary by region, by household and by what is being brewed. Presentations that describe a single correct sequence — particularly those written for an international audience — are usually describing one school's practice, or a teaching simplification, rather than a universal standard.
Its relationship to Japanese tea ceremony
TeaHQ's own reading of well-attested general knowledge, with no single source behind it.
Gongfu cha and Japanese chanoyu are frequently discussed together as though they were variations on one idea. They are separate traditions with different histories, different aims and different material cultures, and chanoyu is built around whisked powdered tea rather than steeped leaf. Treating either as a version of the other misrepresents both.