On March 10th, when the ‘Yellow Envelope Act’ was implemented, members of the Korean Confederation of Trade Unions held a rally to declare their struggle to win the main contract negotiations at the Sejong-daero intersection in Jongno-gu, Seoul. Reporter Jeong Hyo-jin Subcontracted workers who worked in catering and facility management at Hanwha Ocean gained the right to strike against the main contractor. After the implementation of the Yellow Envelope Act (the Revised Trade Union and Labor Relations Adjustment Act) in March last year, which strengthened the responsibility of the main contractor for subcontracting, the subcontractor's union...