A near-field communication data carrier adapted to be mounted in a metal object (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27) having a receiving portion (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 7a, 7b, 7c, 8a, 8b, 9a, 9b, 9c, 10a, 10b, 11a, 11b, 12a, 12b, 13a, 14a, 15a, 16a, 17a, 17b, 18a, 18b, 19a, 19b, 20a, 21a, 22a, 22b, 22c, 23a, 23b, 24a, 24b, 24c, 25a, 25b, 25c, 25d, 26a, 26b, 26c, 27a), comprising: a housing adapted to be mounted in the receiving portion (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 7a, 7b, 7c, 8a, 8b, 9a, 9b, 9c, 10a, 10b, 11a, 11b, 12a, 12b, 13a, 14a, 15a, 16a, 17a, 17b, 18a, 18b, 19a, 19b, 20a, 21a, 22a, 22b, 22c, 23a, 23b, 24a, 24b, 24c, 25a, 25b, 25c, 25d, 26a, 26b, 26c, 27a), wherein the maximum diameter of the housing is not more than 10 mm, while the maximum height of the housing is not more than 10 mm; and an electronic assembly provided in the housing and including a circuit board, a near-field communication chip, and a coil set, wherein the circuit board has a first side and a second side opposite to the first side; the near-field communication chip is provided on the first side of the circuit board; and the coil set is provided on the second side of the circuit board and includes a magnetic core and a coil, which is wound around the magnetic core and is electrically connected to the near-field communication chip, wherein the housing has a first end and a second end opposite to the first end and is received in the receiving portion (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 7a, 7b, 7c, 8a, 8b, 9a, 9b, 9c, 10a, 10b, 11a, 11b, 12a, 12b, 13a, 14a, 15a, 16a, 17a, 17b, 18a, 18b, 19a, 19b, 20a, 21a, 22a, 22b, 22c, 23a, 23b, 24a, 24b, 24c, 25a, 25b, 25c, 25d, 26a, 26b, 26c, 27a) by a direction that the second end is oriented to the receiving portion (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 7a, 7b, 7c, 8a, 8b, 9a, 9b, 9c, 10a, 10b, 11a, 11b, 12a, 12b, 13a, 14a, 15a, 16a, 17a, 17b, 18a, 18b, 19a, 19b, 20a, 21a, 22a, 22b, 22c, 23a, 23b, 24a, 24b, 24c, 25a, 25b, 25c, 25d, 26a, 26b, 26c, 27a); the near-field communication data carrier is characterized in that: the electronic assembly is provided in the housing in a tilted manner; and the first side of the circuit board is oriented to the first end, wherein the housing has a normal line passing through the first end and the second end; and an angle (Θ) between a surface of the first side of the circuit board and the normal line is 15 degree to 45 degree. a housing adapted to be mounted in the receiving portion (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 7a, 7b, 7c, 8a, 8b, 9a, 9b, 9c, 10a, 10b, 11a, 11b, 12a, 12b, 13a, 14a, 15a, 16a, 17a, 17b, 18a, 18b, 19a, 19b, 20a, 21a, 22a, 22b, 22c, 23a, 23b, 24a, 24b, 24c, 25a, 25b, 25c, 25d, 26a, 26b, 26c, 27a), wherein the maximum diameter of the housing is not more than 10 mm, while the maximum height of the housing is not more than 10 mm; and an electronic assembly provided in the housing and including a circuit board, a near-field communication chip, and a coil set, wherein the circuit board has a first side and a second side opposite to the first side; the near-field communication chip is provided on the first side of the circuit board; and the coil set is provided on the second side of the circuit board and includes a magnetic core and a coil, which is wound around the magnetic core and is electrically connected to the near-field communication chip, wherein the housing has a first end and a second end opposite to the first end and is received in the receiving portion (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 7a, 7b, 7c, 8a, 8b, 9a, 9b, 9c, 10a, 10b, 11a, 11b, 12a, 12b, 13a, 14a, 15a, 16a, 17a, 17b, 18a, 18b, 19a, 19b, 20a, 21a, 22a, 22b, 22c, 23a, 23b, 24a, 24b, 24c, 25a, 25b, 25c, 25d, 26a, 26b, 26c, 27a) by a direction that the second end is oriented to the receiving portion (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 7a, 7b, 7c, 8a, 8b, 9a, 9b, 9c, 10a, 10b, 11a, 11b, 12a, 12b, 13a, 14a, 15a, 16a, 17a, 17b, 18a, 18b, 19a, 19b, 20a, 21a, 22a, 22b, 22c, 23a, 23b, 24a, 24b, 24c, 25a, 25b, 25c, 25d, 26a, 26b, 26c, 27a); the near-field communication data carrier is characterized in that: the electronic assembly is provided in the housing in a tilted manner; and the first side of the circuit board is oriented to the first end, wherein the housing has a normal line passing through the first end and the second end; and an angle (Θ) between a surface of the first side of the circuit board and the normal line is 15 degree to 45 degree.