THE OPEN Jan beans:  3 higher Jan meal:   .70 higher Jan soyoil;  8 higher March corn:  1 higher March wheat:  1 higher Grains opened on a firm note with short-covering noted in corn, while wheat prices drifted lower.  The soy complex featured a sharply lower soyoil market after the open, which in turn pressured beans to new lows.   On the news front, President Trump signed the bill supporting the Hong Kong protesters, which may bring some protests from China.  China still wants existing tariffs removed, possibly a reaction to the signing of the bill.  Later in the session, a new round of selling took beans below recent price levels, with corn trying to remain steady, attributed...