A former MTR works supervisor who took bribes from a sub-contractor was yesterday jailed for 21 months and ordered to pay his employer the $40,000 he illegally obtained. District Court Judge Derek Pang Wai-cheong said the behaviour of Wong Hok-shing, 34, 'indicated greed' and the only appropriate sentence was jail. Chan Ming-piu, 46, the sub-contractor who offered the bribes, was jailed for one year. Judge Pang accepted that Chan had been in a relatively disadvantaged position as he simply wanted Wong to speed up the certifying process so his firm, the Xiao Ming Engineering Company, could receive payment. The pair were each convicted on two graft charges on Wednesday. Wong was found guilty of one count of soliciting advantage and one of accepting advantage, while Chan was convicted on two counts of offering advantages. The court heard the MTR sent Wong to supervise a water-leakage repair project in 1998. Wong used his position to squeeze Chan for benefits. He received $40,000 and a night out at a club, Judge Pang said. He said there was no public-safety aspect to the case and the MTR had not suffered as a result of the crime.