Vase-paintings with the mythic motif begin in Geometric Style, but the identifications of Heracles and Apollo become certain only in the 6th century. (Walter Burkert, Homo Necans (1982) translated by Peter Bing (University of California Press) 1983, p 121, and bibliographical note.
Eberhard, Wolfram, A History of China, Berkeley and Los Angeles : University of California Press, 3rd edition, 1969. Cf. p.49 for illustration of Ancient bronze tripod found at Anyang.
Herodotus, The Histories (ed. A. D. Godley), Book I.CXLIV:
"Just as the Dorians of what is now the country of the 'Five Cities'--formerly the country of the 'Six Cities'--forbid admitting any of the neighboring Dorians to the Triopian temple, and even barred from using it those of their own group who had broken the temple law. [2] For long ago, in the games in honor of Triopian Apollo, they offered certain bronze tripods to the victors; and those who won these were not to carry them away from the temple but dedicate them there to the god. [3] Now when a man of Halicarnassus called Agasicles won, he disregarded this law, and, carrying the tripod away, nailed it to the wall of his own house. For this offense the five cities--Lindus, Ialysus, Camirus, Cos, and Cnidus--forbade the sixth city--Halicarnassus--to share in the use of the temple. Such was the penalty imposed on the Halicarnassians." [1]