Tongwei Co Ltd: * SAYS IT SIGNS POLYSILICON SALES CONTRACT OF 55,000 TONNES, EXPECTS TO RECORD NET PROFIT OF 132 MILLION YUAN ($20.73 million), 694 MILLION YUAN AND 992 MILLION YUAN IN 2018, 2019 AND 2020 ($1 = 6.3675 Chinese yuan renminbi) Source: Reuters
