News roundup: Shell plans to invest at least $1B a year on China shale gas … Chevron’s Calif. refinery fire a ‘close call’ … Raising Cane’s gets $45M credit line, refinancing deal

Looking far off into the east: Royal Dutch Shell plans to spend at least $1 billion a year exploiting China's potentially vast resources of shale gas, the firm's top China executive says, part of an a…