At the moment the economic situation is very calm, because it’s situation, but we know from the past we’ve done a lot of work to force to this country a lot of German companies that are interested do start business, start even operating, investing, but we have to wait until everything is becoming calm.

1、为何这里是force to而不是force this country.....to do starte.....

2、that are interested是被动语态，还是interested仅仅只不过做表语？若是被动语态，表达的意思是不是应该是“得到大家有兴趣的不少德国企业开始做业务，甚至开始运行投资.......?

1 a lot of German companies为force的宾语，本应在状语to this country之前。但因为宾语带了非常长的定语从句：that are interested to start business, start even operating, investing, 故宾语后移至状语之后。这种现象称为宾语后移。

2 that are interested to start...为系表结构。

be interested in doing sth: = want to do or have something.

be interested to do sth:= want to find out more about something.

be interested后接不定式作形容词补足语时，不定式一般为hear/know/see/learn/find out等，意为想要知道更有有关某事的状况。

本句中意为不少德国公司想要开办公司，to start似应为in starting.