https://www.reuters.com/article/us-ebang-intl-hldg-hindenburg/short-seller-hindenburg-takes-aim-at-chinese-crypto-firm-ebang-shares-slump-idUSKBN2BT1O6 >(Reuters) -Short-seller Hindenburg Research said on Tuesday it was going short on Ebang International Holdings Inc, sending the Chinese bitcoin mining machine producer's shares down nearly 20% in early trading.