急管繁弦 is an idiom
急管繁弦jí guǎn fán xián
急：快；繁：杂。形容各种乐器同时演奏的热闹情景。
Origin 宋·晏殊《蝶恋花》词：“绣幕卷波香引穗，急管繁弦，共爱人间瑞。”
Example 一面默念，一面想象着红裙翠袖，～的光景，恨不得即时能作查楼上的座上客。（高阳《玉座珠帘》下册）
Word breakdown for “急管繁弦”: Open in Reader →
急HSK 2top 2kAmong the 2,000 most common words 1.urgent2.pressing3.rapid4.hurried+2 more+3 more 管筦HSK 3top 500Among the 500 most common words variant of 管[guǎn]
管HSK 3top 500Among the 500 most common words surname Guan
管HSK 3top 500Among the 500 most common words 1.to take care (of)2.to control3.to manage4.to be in charge of+11 more+12 more 1.complicated2.many3.in great numbers4.abbr. for 繁体[fán tǐ], traditional form of Chinese characters+1 more 1.bow string2.string of musical instrument3.watchspring4.chord (segment of curve)+1 more+2 more