[3] As government officials represented the majesty of the Emperor while carrying out their duties, commoners were required to kowtow to them in formal situations.
For example, at a wedding, the marrying couple was traditionally required to kowtow to both sets of parents, as acknowledgement of the debt owed for their nurturing.
[5] The kowtow remains alive as part of a formal induction ceremony in certain traditional trades that involve apprenticeship or discipleship.
In Buddhism it is more commonly termed either "worship with the crown (of the head)" (頂禮 ding li) or "casting the five limbs to the earth" (五體投地 wuti tou di)—referring to the two arms, two legs and forehead.
Some Buddhist pilgrims would kowtow once for every three steps made during their long journeys, the number three referring to the Triple Gem of Buddhism, the Buddha, the Dharma, and the Sangha.
Prostration is widely practiced in India by Hindus to give utmost respect to their deities in temples and to parents and elders.
Due to modernisation of some sort, it is not uncommon to see boys or men slightly bow their head to an older person rather than having to fully prostrate.
[8] The members of the Titsingh mission, including Andreas Everardus van Braam Houckgeest and Chrétien-Louis-Joseph de Guignes, made every effort to conform with the demands of the complex Imperial court etiquette.
Coming amid tense relations between the Qing and Durrani empires, Chinese officials forbade the Afghans from sending envoys to Beijing in the future.
[10] Hsu notes that the Kangxi Emperor, Yongzheng's predecessor, explicitly ordered that Russia be given a special status in Qing foreign relations by not being included among tributary states, i.e. recognition as an implicit equal of China.
In 1636, after being defeated by the invading Manchus, King Injo of Joseon (Korea) was forced to surrender by kowtowing three times to pledge tributary status to the Qing Emperor, Hong Taiji.