The company has also dramatically increased wages.
Nevertheless, 23 local governments have increased wages above their state minimum.
Under the agreement, the janitors are allowed to join, and to get increased wages and benefits.
A union spokesman said the new contract called for increased wages, benefits and overtime.
"It's been a while since we increased wages, hence the decision," Mr. Ding said on Wednesday.
However, overall losses went up by £10million, mainly because of increased wages and new contracts.
Reduced design costs will compensate for increased wages, but the theatre will have to dip into reserves nonetheless.
Increased wages mean higher costs and this may be affecting the ability of some small businesses to grow.
In exchange, Mr. Clinton agreed to $30 billion in tax breaks for small businesses, to offset the increased wages.
The increased wages demanded by unions resulted in employers' laying off many workers instead of modestly trimming wages.
"Mandating increased wages would lead to higher prices for consumers, lower foot traffic" and lost jobs, he said.
