舉契

'舉契' roughly means 'raising agreement'. If interpreted figuratively, it might represent someone who raises agreements - either suggesting the user is diplomatic, often mediating or making peace between others, or that they are adept or inclined towards establishing mutual consensus in discussions and relationships with others. However it's worth noting that depending on the characters used and the cultural context, this nickname might also refer to certain specific traditional rites in some areas of China, so meanings can widely vary. But overall, it gives a sense of cooperation, concordance or an inclination towards harmony.